Picture this. You're a college student. It's 4 a.m. and you hear your roommate upstairs saying,

there's someone here. Not unusual, right? Maybe she brought someone home? Then you hear crying, a man's voice saying,

It's okay, I'm going to help you.

Still not necessarily alarming, could be comforting a drunk friend,

but then you see him.

A figure in black, about 5'10, bushy eyebrows,

walking past your door toward the back exit,

and something feels wrong.

Dylan Mortensen went back to her room and locked the door.

Six hours later, she'd learned that decision allegedly saved her life.

I'm Tony Bruske, and this is the R looklook-back on how we got here in the case against

Brian Koberger, a 10-part series about four college students one night in November,

and an investigation that would reveal just how much digital breadcrumbs we all leave behind.

Moscow, Idaho is a college town in the northern part of the state.

Home to the University of Idaho, it's the kind of place where violent crime is extraordinarily rare.

According to FBI crime statistics, Lata County, where Moscow is located,

typically reports zero to two homicides per year.

The last time the area experienced anything approaching this level of violence was decades ago.

The University of Idaho dominates the town's identity. Founded in 1889, it's the state's land grant

institution and the primary economic driver for the region.

Students make up a significant portion of the population and when they're gone during breaks,

Moscow feels noticeably quieter. November 13th, 2022 was a Sunday. The day before the University

...