The Loch

There is somebody in our town killing people.

Local paper, came out yesterday.

Evidence we found in the newspaper...

Fill out your name and address on this form.

The handwriting is distinctive enough to give us grounds

to detain a suspect.

He's lying about something.

Did you notice him locking the door of his study?

I did.

We need a record of your whereabouts on Tuesday.

I took out tours. I can show you ticket stubs.

Leighton Thomas murdered two men. Twenty years ago.

Dolly.

He suffered a cerebral aneurysm.

No!

Jonjo! Oh, no, no no.

I can't believe this is happening in my town.

If you live long enough, you see everything.

Well, let's do it.

Blunt instrument. My guess... some kind of hammer.

Two blows.

Massive trauma to the skull. Now, I don't know if you've seen this...

When you find the hammer, there'll be a nick in the face.

Nicole. Leave her alone.

Serial killer.

Why'd we hear that when it's too late?

Why didn't you say?

You should have protected him!

Look at him, Frank.

Look at what you've done to him.

I'm sorry.

Let's give them a moment, Frank, okay?

I'm sorry for your loss.

Jonjo Patterson.

Killed by two hammer blows to the skull.

Very different M.O. to Niall Swift. Why?

The killer goes to the bother of removing part of Swift's brain,

but Jonjo is dispatched like that.

Does he want us to think there's more than one person involved?

Maybe there is.

I don't think so.

If anything, he wants us to experience chaos.

That's useful.

I can only interpret what's in front of me.

The killer's life was chaos. Now he's in control.

We need to go back to Petrie's house. See what's in that locked room.

We also have handwriting that would seem

to put Petrie at the scene of Swift's murder.

Are there other connections?

Jonjo was almost certainly killed elsewhere

and dumped in the van.

There's no spatter...

no signs of a struggle.

We do have some positive news.

SOCOs have removed a hair from the interior roof fabric.

The hair is not Jonjo's.

The van was stolen in Manchester 10 days ago.

The fuel tank was almost full,

so the driver must have filled up nearby.

I'll check forecourt cameras.

Why are we still waiting for the search warrant for Dr. Marr's?

I'll talk to the sheriff's office.

Niall Swift's phone records... Where are they?

Uh, there was a legal problem with the phone company.

Ask them, "Do they want to be front-page news tomorrow?"

Dr. Marr sacked Niall Swift two hours before he was murdered.

Jonjo messaged friends,

saying he knew something that would put Marr in prison.

So talk to Jonjo's friends, find out what he knew.

All lines of inquiry must be pursued.

Thank you.

How's it going?

Mum.

Why am I not feeling anything?

You're in shock, darling.

It's okay.

Come on.

I gave a full statement last night.

I don't understand why I've been told to come back.

Look, you've been asked to come back

because we believe you can help.

I hung around for two hours yesterday.

Sorry.

I mean, one of your students was murdered.

After you.

Okay. Take a seat there.

D.C.I. Quigley will be with you in a minute.

Are you gonna be okay?

Mum.

Okay.

So, Evie, how was Jonjo at college?

Did he get on with Mr. Petrie?

Y-Yeah.

You don't sound too sure.

No, Mr. Petrie was cool with him.

Cool as in?

N-Nice.

You were in class with him every day.

What did you see?

Evie, something you think might be trivial

could actually turn out to be crucial.

He used to call Jonjo one of the special ones.

Oh, this is mental.

I know, isn't it?

How long's it been?

20-odd years. At least.

You saw me on the telly?

I saw you on the telly.

I thought to myself, "That's fucking Dolly."

Unbelievable.

What are you doing, man? I'm making you a cup of tea.

I'll have them both.

Remember that drink I invented?

Coffee, tea... same mug.

That was the nuts.

So, how did you find me?

Asked a couple of Jocks. Bingo.

And how did you describe me?

Murderer.

Manc lad. Works the boats.

What you getting all serious for?

You do know if they see us together, we go back inside...

for good.

What about our agreement?

What agreement?

I can't believe you just said that.

We agreed to look out for each other once we were out.

Yeah, I am looking out for you.

I don't want you to go back in prison.

Dolly, man, what you on about? Don't.

You don't call me that.

Yeah?

What it is now?

Leighton Thomas.

How come you got a new name?

You're gonna tell me you've changed now, aren't you?

Of course I've changed.

I was 15 when I met you.

You haven't changed that much, though, have you?

I saw that kid last night.

I saw the damage.

Huh!

Huh!

That was classic Dolly.

No, that wasn't me.

No, I didn't kill anybody.

Dolly.

Now, that's just not true.

Is this gonna take long?

Is that a problem?

I made a statement. I don't know what I can add to it.

You alleged you found Niall Swift

at the bottom of Carn Mohr. Mm-hmm.

We have evidence that puts you at the top,

where he was murdered.

What?

Is this your handwriting?

No. It's similar.

This handwriting was lifted from this...

found in the area Niall Swift was murdered.

Is this from a crossword?

I don't do crosswords.

And I would never buy that paper.

This totally contradicts what you're saying.

Your handwriting appears to match.

Look, the handwriting is similar, but it's not mine.

Listen, I am here voluntarily. I will not be subjected...

Do we have permission to search your house?

Absolutely not.

Detective Murray, apply for a warrant right away.

Yes!

I have to go.

Sit down.

Sit down.

Craig Petrie, I'm detaining you

under Section 14 of the Criminal Procedure Act 1995.

I suspect you of committing an offense

punishable by imprisonment,

namely the murder of Niall Swift.

You can keep me for 12 hours.

Yes.

Could somebody call my wife?

Tell her I'll be home this evening around...

9:15?

Okay, people, the warrants for Petrie have come through.

Yes. So, three teams.

Petrie's house. Right.

Car. Office. Yes, ma'am.

Ma'am.

Um, I want in on the house search.

As an observer?

I'm in. Yeah.

Mummy, who is it?

Go to your room.

Now, please.

According to your statement, the day Jonjo Patterson went missing...

Jonjo? I thought I was here because of Niall Swift.

There's a locked door back there.

Do you have the key?

Craig has the only copy. You'll have to ask him.