FOLSOM: Mom, I know what's going on.
If you're running product for these guys,
I can't help you.
Previously on CSI: Vegas...
FOLSOM: They killed her, she's gone.
ROBY: You cannot investigate
the death of a family member.
Jeanette Folsom. Who did it?
FOLSOM: Raphael Tarquenio-- is that your boss?
KHAN: I'm not telling either one of you a damn thing.
I found the guy who did it.
Kahn Schefter killed my mother.
ROBY: Josh was officially charged.
I'm looking for Raphael Tarquenio.
How long has it been?
Not nearly long enough.
I killed Kahn Schefter.
So we're supposed to believe
this was your idea?
I trust this concludes the matter.
TREY: Murder charges got dropped.
I want to say thank you
for believing in me.
I'm not sure you're gonna keep your job, Josh.
I saw that, Hernandez.
The four-month sleep regression is no joke.
Where's the cavalry?
Oh, should be here soon.
Till then it's just us
and the body.
What do we know?
Not a whole lot.
A fisherman called 911
when he saw a stranger trespassing on the dock.
Which, in hindsight, may have been a bad idea.
Gunshots rang out on the call, then the line went dead and...
So did the caller.
Explains the dead body.
And what about the container?
Your guess is as good as mine.
Well, let's not guess.
What?
Whoa! Slow down!
Officer Hernandez died in an instant.
It's a miracle I didn't, too.
When I came to in the hospital the next day,
I was told that my camera,
the dead body and that yellow plastic container,
all gone.
The whole crime scene was wiped.
all gone.
The whole crime scene was wiped.
Like it never happened.
Whoever it was got what they came for.
Case was never solved.
What are you thinking?
The thing I've never been able to shake
is that I recognized that car that hit us.
It was part of this drug investigation I'd been working.
Raphael Tarquenio?
One of his associates.
God, the man needs to go down, Max.
Lord knows
Joshua agrees with you.
Well, the problem is,
the SUV was never found.
We were never able to establish a link
between Tarquenio and the boat.
The man is my white whale, and I could never prove
that he even got onto the water.
Until now, maybe.
Look what I found at his house.
RAJAN: Boss.
Hey. You asked to see me?
Yeah.
I'm gonna go back to the boat, pick up where I left off.
I'll let you know when it's time to start the engines.
Go get him, Ahab.
So...
these time cards are now your responsibility.
Happy days.
I know you and I knocked heads
over your idea to partner people up...
It's okay. No need to apologize.
I wasn't planning on it.
So, you partnered
Catherine and Beau, and Chris and Penny up.
Mm-hmm.
Any of them have a say in it?
No.
Do you care to reveal why
those would be the best pairings?
I have my reasons.
Of course, I told them
that I drew their names out of a hat.
I didn't want anyone to object.
Okay, the pairings worked before you knew they were permanent.
Hmm.
Two heads are always better than one.
You'll see.
I'll get right on these.
♪ ♪
CHAVEZ: You don't have to go.
I know things have been...
complicated lately,
but you can stay.
I don't bite.
Yeah, well, I'd just keep you up.
I'm spooked about my date with Internal Affairs tomorrow.
Hey.
You have the Garrity rule.
Use it. You don't have to say a thing.
You shouldn't say a thing.
Yeah. Still, I should go.
Damn it.
Well, it was worth a shot.
I've taken a dozen shots
against Tarquenio.
I need one of them to land.
Are you okay?
Catherine.
If we're gonna be partners, you should know
I-I don't do well with long silences.
I just took a breath.
Yeah, good. Good. Get it out of there.
Don't let it fester.
Okay.
You leave me no choice.
Fill the gap, I will.
You know, I think...
I think I could be a boat guy in my next life.
Although the idea of a life without socks freaks me out.
But, you know, the-the... the wind in your hair, the sun.
It's not really my thing.
Right.
Yeah, yeah.
It's downright depressing when you think about
what the drought's done to the waterline.
I mean, look at the dock here, this tangle,
the fishing line, it didn't look like that a few years back.
Here.
Look.
Today. 2019. Today.
2019. Today.
Y-Yeah, yeah, yeah. H-Hold on a second. Just...
What?
WILLOWS: Is that a prosthetic limb?
What looked like the top of a bumper back then...
No, it couldn't be.
Yeah, i-it could be.
Let's get it out.
All right.
Holy mackerel. It's a leg.
GILL: That is one funky plastic leg.
Wow. This thing's been in the lake so long,
it has its own ecosystem.
I need help figuring out how to clean it off.
Beau's still on the water,
seeing what else he can dredge up.
What are you hoping to find?
Proof that this prosthetic is somehow tied
to Raphael Tarquenio.
I'm convinced that he is connected to that dock
where this leg bobbed up.
Well, we can't use bleach as a cleaning agent.
No, it would destroy the algae
but also any remote chance of usable DNA.
And it'd require scrubbing,
which would compromise the integrity of
whatever evidence we do find.
No, we need something that's gonna break the bond
between the algae cells.
Maybe an oxidizing agent.
Something that causes free radical formations.
BOTH: Sodium carbonate and water.
I'm so glad you two found each other.
Wait.
Look at that.
Something corroded the metal on the prosthetic.
But the plastic's totally intact.
Only a few types of chromic acids could have done this.
I wonder if the person attached to this leg
was dissolved the same way.
Dark.
WILLOWS: Well, it might explain that plastic bin
I found on the boat that night.
Maybe all the contents were just dumped in the lake,
leg and all.
The, uh, leg's serial number was eaten away,
but, look, the atomic pattern was still down in there.
EBSD machine just gave us this.
Entering the serial number
into the national arthroplasty register,
and... Theresa Moren.
Looks like she's a dean at a prep school here in Vegas.
Or at least was.
So, what's her leg doing in the middle of Lake Mohave?
I don't know, but check out that caption.
"Farnsworth Prep's Jocelyn Tarquenio
sinks a three-pointer."
Raphael Tarquenio has a daughter who just so happens to go
to the school whose dean lost her leg?
I can see him raising Dobermans.
(scoffs): But a sweet little shooting guard?
And according to her obit, she died
in a scuba diving accident in Mexico.
The body was never found.
Check out the date. Dean Moren died five years ago.
That's the same week that I was almost run over by the SUV.
Best question in Vegas: what are the odds?
♪ ♪
♪ Who... are you? ♪
♪ Who, who, who, who? ♪
♪ Who... are you? ♪
♪ Who, who, who, who? ♪
♪ I really wanna know ♪
♪ Who... are you? ♪
♪ Oh-oh-oh ♪
♪ Who... ♪
♪ Come on, tell me who are you, you, you ♪
♪ Are you! ♪
♪ ♪
COURTNEY: I didn't want to believe it, but...
this does look like Mom's.
Courtney, this is Max Roby, she runs the crime lab
here at CSI.
Hey.
So... so you do think there was a crime?
The detectives back then,
they told me Mom died on a scuba trip.
Well, there is quite a bit of evidence that said that she did.
WILLOWS: Your mom was never seen
after school ended that Friday.
Her car was found in Baja at a scuba shop in Punta Azul.
I know.
My mom and I weren't that close at the end,
but that story never sat right with me.
Had she ever scuba'd before?
Before she lost her leg, yes.
But after it was amputated, never.
ROBY: But you said you two weren't close,
so...
COURTNEY: Even at our worst,
I knew when she was traveling.
She never called.
Does the name Raphael Tarquenio mean anything to you?
It rings a bell,
but I'm not sure why.
Wait, he's one of Mom's big donors
at Farnsworth Prep, right?
I don't mean to make this about me, but...
what's the LVPD angle here?
What do you mean?
I mean, how is a prosthetic
going to help us take down a narco-trafficker
who had Josh's mom killed?
We don't know that it will.
I mean,
we don't know yet.
PARK: That could change
if we could prove someone in the Tarquenio camp
had access to the specific acid
that was used on Dean Moren's leg five years ago.
And that Tarquenio staged Dean Moren's death down in Baja.
And that he stole everything of value from the crime scene
on that boat five years ago.
Should be no sweat.
I mean, we already have a plastic leg.
A plastic leg which showed up
right next to the spot where a cop was killed.
All right. Let's reopen some cases.
Okay, let's figure out what made this
look like this.
♪ ♪
Go ahead and add sulfuric acid
to the no-no list.
It's eating through the metal, the plastic...
Oh, the table.
You're never going to pin this down on Tarquenio
if we can't even find the right acid.
There are still dozens more to try.
These are just over-the-counter basics.
RAJAN: Dean Moren was last seen at Farnsworth Prep.
Maybe someone there brewed up something
more unique in their chem lab.
I still think it needs to be chromic.
How about a break? We've been at this for over an hour.
Weak. An hour is nothing.
I can hold a plank for an hour.
No, you can't.
GILL: Are you doubting me?
Let's go right now.
I'm serious. I'm warmed up. Let's go.
RAJAN: Guys.
PARK: Whoa, she's pregnant.
This can't be good.
Guess she's making more little IAB detectives.
CHAVEZ: Who is that?
That's Nora Cross. Internal Affairs.
She spent some time here before you came along.
You don't think...?
I do.
I think she's handling Folsom's inquiry.
PARK: She looks nice, right?
Sweet, even?
That's the face you see before the axe falls on your neck.
They really sent the one IAB detective I know?
Prior knowledge of a suspect
is actually a good thing in my line of work.
But do you want to talk about conflicts of interest?
We could start with you springing Trey Cahill from jail.
Guy you arrested a few days prior?
I-I've known him since we were kids.
I wish I was better at keeping in touch with old friends.
Carolyn Lim, Brittney Tichey...
We don't even swap Christmas cards,
much less post each other's bail.
Well, I'm here to answer any questions I can.
Okay.
Here's one.
Why did you cover for Trey
during Kahn Schefter's murder investigation?
You can stay mum.
Obviously, your union rep's advised you.
But your conduct in the time that you and Trey spent
with Mr. Schefter, that's what is at issue.
You can ask. I-I...
I don't remember all of it.
Truly.
But...
go ahead.
Nah.
This isn't going to work.
Wait, is that it?
Are you going to talk to my co-workers?
No.
Are you going to talk to my co-workers?
No.
I'm gonna talk to you tomorrow
at the hangar where Trey brought Mr. Schefter to you.
We clearly need to do what we can
to refresh your memory.
Raphael Tarquenio? Yeah. Gosh.
I got to be honest. I barely know the man.
Aren't you the dean here?
Yeah, and I try to meet all of our donors.
But Mr. Tarquenio likes to keep to himself.
Tarquenio Fieldhouse. Fancy.
It has been a labor of love.
We spent the past five years refurbishing this, uh, old gym.
Five years?
So, is there anywhere we'd find chromic acid on campus?
I don't think so.
And I used to be the head of the science department,
so I would know. To be fair,
I'm just a biologist. It's a hard "cell."
"Cell." Nice.
Just to be on the safe side,
we'd like to visit the science lab.
Yeah, whatever you need. Yeah, right this way.
Are you investigating or kissing this guy's ass
to get your daughters into school here?
Little bit of both.
Fieldhouse may be the jewel of the campus,
but this is my pride and joy.
It's not a science lab, it's a maker's lab.
A maker's lab.
You've got robotics, uh, you can make pottery.
Look at that huge 3D printer. Wow.
He excites easily.
He's a man after my own heart.
Looking at atoms all day can be Bohr-ing.
Yeah?
Let me show you something.
Okay.
You two knock yourselves out. I'm gonna take a look around.
This is the latest and greatest.
Oh.
Yeah. You're not allowed back here.
(chuckles): I'm with CSI.
I'm investigating Dean Moren's death
from a few years ago.
I'm new here, but apparently everyone loved her.
Do you know Raphael Tarquenio? He was...
Yeah, I know who he is, we all do. His nightmare daughter
was supposed to be expelled a few years ago,
and all the teachers keep praying it'll still happen.
Which it won't if he keeps writing those fat checks.
Right.
Have you ever seen anything like
chromic acid around the school?
No. You really wouldn't find something like that at a school.
More like an aeronautics facility.
Maybe a construction site.
Excuse me.
RAJAN: Allie Rajan.
Hey, Allie.
So, no chromic acid at the school,
but what if Tarquenio uses it
at one of his legit businesses?
Afraid you're going to have to put that back, ladies.
Raphael Tarquenio, in the flesh.
Unless he gave you permission to, uh,
test the lumber without a warrant?
Congratulations. We visited a couple of your projects today.
It seems that business is booming.
At least, your legitimate one.
All my business is legitimate, Ms. Willows.
You don't have anything that says otherwise.
Don't be so sure.
We collected samples
of lumber from your job sites.
A lot of it has been treated with CCAs, chromic acid.
And your point is?
RAJAN: Weather-proofing lumber
is one of its more productive uses.
But it's also great at dissolving bodies.
It's time for you two to go.
WILLOWS: We were just leaving.
Ah. Can you run the other tests by yourself?
I have to go. Sorry.
Everything okay?
I don't know. Sorry.
That bad? What happened?
Nora Cross. She does her homework.
She kind of made it seem like I was already screwed.
Maybe she's bluffing.
Although...
she did email me,
asking to meet her at the hangar tomorrow.
I'll be there, too.
Okay.
Hey, Allie,
I saw a piece of paper sticking out of her file,
like a little note.
And?
I could've sworn it was in Serena's handwriting.
What, she never mentioned Nora before?
You don't think...
I really don't know what to think.
Oh, speak of the devil.
Chavez, hi. What's going on?
All right. I'm on my way.
What was that about?
Just a case.
What was that about?
Just a case.
She was updating the very important
new day shift supervisor on a development.
That's right. H-How's it going?
Trying something new. Partners.
Oh.
Yeah.
Oh.
Yeah.
Max isn't quite on board,
but fake it till you make it, right? (chuckles)
You'll make it.
Hey.
You'll make it.
Hey.
I was meant to be making you feel better.
You did.
Go on. I'll see you tomorrow.
WILLOWS: What's going on?
School janitor went to empty the trash
and instead found this.
ROBY: Okay.
There's enough blood here for someone
to have died from exsanguination.
WILLOWS: Only problem is,
I don't see a body.
There isn't one.
Oh, and by the way?
Dean Canto never showed up at a fundraiser tonight.
He can't be reached.
I think he's missing.
The kiln's been on.
Ooh.
What is it?
ROBY: Well...
it's not a ceramic vase.
I think I recognize that gold watch.
Dean Canto was wearing it earlier today.
So, uh, for anyone keeping score,
that makes two dead deans.
Whatever happened here was ugly.
Even this guy got his butt kicked.
Better than being melted in a kiln. Savage.
That is his M.O.
You think Tarquenio is behind the dead dean, too?
24 hours after we started asking
questions, another body disappears.
Almost disappears.
You know, there might not be chromic acid here.
But there may be the ingredients
with which to titrate chromic acid.
Can somebody help me open the door, please?
For what it's worth,
I never believed that whole scuba story.
I even filed a missing person report back in 2019.
What do you think really happened?
I was working one night and...
you know, minding my business,
and I hear this loud fight, lots of yelling.
It was Dean Moren and that Fieldhouse guy.
Raphael Tarquenio?
BING: About a month before she disappeared.
I don't know what she did to get him riled, but...
I thought maybe that Tarquenio guy--
he was the wrong dude to get tangled with.
How's it feel to be back? Scene of the crime.
What crime?
You tell me.
Mr. Folsom, the last time
I was called out to CSI,
I wrote a glowing report about how honest you all were.
I don't mean to make your job harder for you,
but, um, I'd like to keep mine.
I get it. You don't have to talk,
but you might want to speak up in your own defense.
Let's see where the evidence leads us.
Allie, what do we have?
It's pretty thin.
Um, the padlock on the gate was cut.
We found a box cutter on the ground here
that was covered in blood that we later confirmed
belonged to Kahn Schefter.
Luminol was sprayed around the area.
A large circle, about five feet in diameter,
fluoresced. The reactant was bleach.
Did you clean up blood here?
RAJAN: No DNA or blood proteins were recovered.
No fingerprints either, for that matter.
There were none in the entire caged area.
Someone knew how to clean up after themselves.
Didn't they, Mr. Folsom?
Uh, that is...
a reasonable deduction.
All I'll tell you is,
Trey and I were here that night
with Kahn Schefter.
We asked him who had killed my mom,
and eventually
we realized it was him.
Josh.
And then?
And then we left.
CROSS: Allie, a moment?
Can you be neutral here or not?
Yeah, of course I can.
Good.
'Cause if that's all we're getting out of him,
this inquiry is gonna hinge on what little evidence we do have.
Where did you get this?
Serena.
Where did you get this?
Serena.
Detective Chavez.
She had to relinquish her file.
Run the blood for me.
Let me know what you find.
ROBY: Something on your mind, Catherine?
What's with the side-eye?
Nothing.
What's with the side-eye?
Nothing.
I'm just, uh,
picking my moment to ask about Folsom.
You think he'll be able to get his job back?
Let's just say I'm glad it's not up to me.
It's up to the review board.
I am having a hard time
compartmentalizing this one.
Sometimes it's impossible.
Sometimes work is personal.
I've noticed that.
Are you turning this around on me?
I see how you get around Tarquenio.
All I'm saying is, I do not need another one
of my CSIs self-destructing.
That's fair.
ROBY: Will you look at that?
The blood from the maker's lab
at Farnsworth Prep came from not one
but two sources.
GILL: Oh, whoa. You've been busy.
What am I looking at?
Blue is the attacker.
Red is Dean Canto, I assume.
Neither was in CODIS?
Nope. We should have a DNA match on the vic soon,
assuming it was the guy
who bled a lot more.
Then we should iso
the blue stuff, the killer's blood.
It might tell us
how many injuries he sustained,
how tall he is, handedness.
We just have to go blow by blow.
It started over here.
Three instances
of medium-velocity red blood spatter.
Suggests the attacker was punching the dean
in the head.
We have height, width, directionality
of each blood drop from the crime scene. Who did this?
It's exquisite.
Max.
Boss did most of the work.
Trigonometry should do the rest.
Best day ever.
Okay, I'll go get my lucky protractor.
Yes!
Oh, my goodness.
How long have you been in here with these fumes?
It's not working.
Yeah. So I can sense.
I haven't been able to titrate the acid that deteriorated
Dean Moren's prosthetic using
the materials from the maker's lab.
I can't do it at all, actually.
I-I don't know how the killer
ginned up his special brew.
Everything I do is either
too strong or it's not strong enough.
Maybe it's time to call it.
Mm.
Maybe grab something to eat?
Mm-mm.
In that case,
I'm going to take your very strong physical cues
and, for the sake of our...
still blossoming partnership,
I'm gonna leave you to it.
Chavez, can I speak with you a moment?
Yeah.
What's up?
How long have you known Nora Cross?
You acted like you never met her before,
but that's not true, is it?
I used to know her a little.
How?
Should I go ask her?
Nora recommended me for this post at CSI last year.
After the David Hodges mess,
there was a general consensus, that someone from LVPD
should keep tabs on folks here.
So, you're informing on us?
This isn't a crime family, Allie. It was oversight.
I was just doing my job.
Does Folsom know?
You never told him either.
I will.
Let me be the one to tell him.
Please.
I'll give you a day.
Good morning.
Allie.
Hey.
That's the same shirt from yesterday. And you.
Did you both stay here all night?
Oh, there's about to be coffee.
Do you want some? We've had a lot.
Well, at least you're not at each other's throats.
Oh, we're not fighting. We're fighting the math.
PARK: 13 hours.
We've been checking and re-checking the equations.
All we know is that
the person who was getting hit repeatedly
on the head is only five-eight.
I thought Dean Canto was taller than that.
Correct. He's six-two.
That's a significant difference.
It's way outside of our fudge factor range.
Meaning what?
PARK: Meaning we're still missing something.
Meaning what?
PARK: Meaning we're still missing something.
Because, the way we've got it,
Dean Canto won the fight.
Then how did he end up inside a kiln?
WILLOWS: You know I want this guy, Max.
Anything I can do to help?
ROBY: Well,
you know I love to share the rock,
but sometimes you got to...
you got to go hard in the paint yourself.
What constitutes a swish?
I am trying to get
a positive I.D.
on the body that was in the kiln.
And it is a delicate dance.
How delicate is it?
89% failure rate.
Oh.
89% failure rate.
Oh.
Yeah.
Okay. So,
the ash from the kiln
was heated at 2,400 degrees,
and I am using an enzyme solution
to remove the nitrogenous bases-- excuse me--
and I am gonna try and repair
the tears in this DNA.
Damn it. I missed it.
Well, you did say the failure rate was 89%.
No excuses. Excuses are for other folks.
Hey, Max, it's okay.
I mean, this sample may be kaput,
but there's other ways to test ash.
Let's pop over to Trace
and see what else burned up in that kiln.
Okay, what do we got?
FTIR says
the ash contains a cocktail
of mercury, lead, antimony, beryllium.
Chromium, cobalt, arsenic,
and iron oxide.
Put it all together and you get?
ROBY: Color tattoo ink.
But this guy, he-he was a dean of a fancy prep school.
Did he look like the type to have sleeves under his sleeves?
I'd be surprised. I mean, he'd have to be covered in ink
to reach this level of concentration.
Maybe the residue is from something else.
Or maybe the body in the kiln
wasn't Dean Canto.
That would square with Chris and Penny's findings,
but how did his watch get in the kiln?
That's the question.
Why just make it look like Dean Canto died?
♪ ♪
I did it.
Oh! I did it. I did it.
Hello? Hello?
Hey, uh, don't-don't you want to see how it works?
Of course we want to see how it works, but you sent us all away.
Right. Sorry. Uh, I was putting too much distilled water
to the chrome oxide earlier.
My-my paste wasn't getting pasty enough, but now...
You did it?
Yeah.
Ugh.
What was that weirdness?
Sorry. I think
we only get, like, two out of the five.
I mean, only a serious chemist
could figure out this cocktail.
I sincerely doubt that
Tarquenio or any of the goons he has cutting his drugs
have my chops.
I still couldn't tell you who did this.
Yeah, I know.
This is the last thing I want to be doing either.
It is not that.
I ruined a sample earlier.
Can we assume
that your heart is functioning well
with all that additional beeping?
I kind of need to focus.
Oh. Oh.
What?
I see what's going on.
You have the yips.
I do not have the yips.
I'm mad at myself.
Would it help you to be mad at someone else?
Yeah.
Chavez has been reporting on us
to the I.A.
Wait, you knew she was a plant?
Chavez is not a plant.
She was assigned here to make sure
that we are doing things by the book,
which we were, which we still are.
Which is why there was not any need for anyone to know.
Any professional reason, maybe.
Folsom didn't even know.
(whispering): It's none of my business.
Is it yours?
Whoa.
When it rains, it damn pours.
The blood on this photo belongs to Joshua's mother.
That's better than Kahn Schefter's, right?
No.
It might be worse.
Where did he get it from,
if he didn't steal it from the morgue?
Why would he do that?
That is Nora's job to figure it out.
But I do have to tell her.
The case I was working five years ago--
when I was almost mowed down-- this...
Mm-hmm.
is the man I saw painting the gym
at Farnsworth Prep the other day.
I knew I recognized him.
Look at all those tattoos.
WILLOWS: Tarquenio has the contract to refurbish the gym.
He's got his guys crawling all over that campus.
And maybe it was his skeleton that we found in the kiln, huh?
Self-defense? Could be why Dean Canto
made it look like he had died.
Or maybe it's more sinister than that.
Maybe Paul Canto killed Dean Moren for her job.
And didn't want to stick around and answer questions about it.
If he's still alive, he's gonna...
Come on, now.
I have been through the security footage twice.
Cameras never caught Dean Canto leaving campus.
He was definitely injured in the maker's lab.
I mean, we were wrong about whose blood was whose,
but there was plenty of both.
I'd guess he's hurt and he's hiding?
Out of view of the cameras.
Dean Canto, come out, come out, wherever you are.
♪ ♪
He's here.
Yeah, we need an ambulance at Farnsworth Prep.
Stabbing victim,
near sepsis.
I'm a dead man.
No, no. Hey, hey. You're gonna stay right here, buddy.
Who did this to you?
Who do you think?
I got to ask: why hunker down in the cafeteria, man?
I-I was gonna get away. I was gonna sneak out
in a food delivery truck on Monday night.
And I almost made it.
That's five stars.
And I almost made it.
That's five stars.
You were in sepsis with a lacerated G.I. tract.
You were never gonna make it.
WILLOWS: You owe us your life.
And some answers. Start from the beginning.
The beginning of what?
You started working for Tarquenio.
I-It started... with his "donation" for our gym.
He gave us $13 million for that project,
but it was contingent on his construction company
doing the work, for a fee of $13 million.
He was laundering his dirty money through the school,
and you helped him.
FINADO: You got in bed with a drug lord.
Never stopped passing yourself off
as an educator, though, a-a scientist.
I was looking for a way out.
Then you folks came around, you started asking questions.
Why did Tarquenio target you?
Because...
I knew what he did to Dean Moren.
She made the mistake of turning his donation down.
Mr. Tarquenio did not like that.
Which is why he finished her off himself.
Can you prove that?
I might be able to tell you
more details if...
witness protection is on the table.
For an accomplice in a homicide?
Oh, dream on.
You mixed up the chromic acid for him, didn't you?
I wasn't there when he used it, I swear.
I just made the juice.
If you want our help, you got to give us something concrete.
Something that ties Tarquenio to Dean Moren's murder.
The boat, the container
that was stolen from the old crime scene.
Something!
I wasn't there.
But Tarquenio did hurt himself
when he was... melting her.
The next day he had a bandage
on his hand and he still has a scar from that.
There was a keloid scar on Tarquenio's hand.
Keloids are caused by the buildup of excess collagen.
Right?
Yeah, and sometimes
they're formed around a foreign contaminant.
Did you ever get a medical warrant, Beau?
TARQUENIO: Ow!
WILLOWS: Ow. You okay?
You could just tell us how you got the scar.
Why it never healed properly.
Why you didn't have a doctor take a look at it.
Go to hell, Willows.
Or better yet,
you could just explain what really happened to Dean Moren.
Here goes nothing.
♪ ♪
You flooded this city with fentanyl and heroin.
You don't have any proof.
You sent someone to a crime scene five years ago,
and had a good man killed.
You've never had any proof.
You ordered Jeanette Folsom's murder.
None.
You're right. I can't prove any of that.
Because...
you've always kept your hands clean.
Until you didn't.
I hurt my hand in a panini press.
Oh, yeah?
Was it a steak sandwich?
Because there was a bone in there.
When chromic acid goes to work
on the calcium phosphate in bone,
you get jagged little chunks that dissolve
until there's nothing left.
Unless they don't stay in the solution.
You've been carrying around a damning little piece
of Dean Moren in your scar
for years.
And I can prove that.
I was just saying it the other day.
Sometimes it's not business.
Sometimes it is personal.
And I got to tell you,
this one
feels damn good.
How did, uh...?
It's over, Josh.
It's over.
The blood on the photo belonged to Folsom's mother?
It'll be interesting to see how the review board interprets it.
Well, I can make one prediction.
They won't.
They'll ask you to interpret it.
Wait, what?!
They want you to testify.
You know the science.
You know the man.
They want me to put a nail in his coffin.
They want you to do your job.
I can't believe...
I'm sorry.
I really am.
Yeah.
Yeah?
Max?
Yeah?
Are you doing okay?
Yeah, I'm fine. What is it?
It's just...
Did you ask everyone how the partnerships were working out?
It might have come up.
I don't understand.
Why can't you just trust me with my idea?
ROBY: Because of this.
In my time of running this lab,
I have had exactly one CSI
who permanently partnered with anybody.
Folsom, he chose you.
And I cannot help but notice that
he is the only one
who stopped being accountable to me.
Those two things are completely unrelated.
Have you ever accidentally
started a fire in a lab?
I have, yeah.
I think everyone probably has.
The most important
type of chemistry in this lab
is between people.
They bond.
They break apart.
And they are just as combustible.
You put them over an open flame,
you better keep an eye on them.
Mm.
Hey.
(laughs) You're already ready for bed?
I want to get to sleep early.
I got the review board at 8:00. Pizza if you're hungry.
I-I'm probably not staying.
Um...
I couldn't tell you this before.
And then it was never the right time.
Tell me what?
I didn't just land at CSI, Josh.
I was assigned to the lab
to monitor things after the David Hodges investigation
for Nora Cross.
I just wanted you to know.
Why are you telling me this now?
Maybe if we'd both been more open,
it'd be different,
but things haven't been right
between us for a while.
And I know a part of you will never forgive me.
But I think we both know this isn't working.
"This isn't working"? Yeah. I mean,
but was it ever working, or was it always just work?
That's not fair. (stammers)
This was real.
Um... tomorrow's a big day.
And I still completely support you.
I mean it.
Yeah, uh, thanks.
I think I'm probably
better off alone.
Mm-hmm.
Captioning sponsored by CBS
and TOYOTA.
Captioned by Media Access Group at WGBH access.wgbh.org t?