This is a national story.

This is a huge story.

Fake names, new identities, new jobs, new country,

plastic surgery.

You know, you have this sweet girl that did absolutely nothing wrong. She's got a whole life ahead of her. She was this incredible cyclist that was

going to do great things. You are like ready. I'm ready.

You're ready.

And to see that taken away from somebody over something completely senseless.

I mean, no one in cycling gets murdered.

Like what the hell is going on?

There's some suspicious activity going on in there, so we definitely went with a suspicious death. When you hear those screams in the video,

screams of pain, screams of fear?

Scrams of fear.

Colin had been the last person to be with Mariah or be seen with Mariah before her death.

When detectives hear about relationship between this young man and two different women.

That's often the motor for murder.

That's why I really want to get your side of the story because maybe there's a lot more going on.

I might be talking about two suspects. Maybe there's a lot more going on.

I might be talking about two suspects here. You thought that you were going to be able to get away with this. Ambulance, what's the address paper?

There's a stranger in the there.

At 911 call was the most traumatizing thing I've ever heard.

My friend is staying with me, and I just walked in and she's laying on the bathroom floor and there's blood everywhere.

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