Blayne Alexander

We're looking for any clue at all, and there's a camera right here outside of Jay's apartment.

Looking right at his door?

Yes, ma'am.

It was tremendous in this investigation, being able to identify when Jay was leaving his apartment.

Not just when, but how.

The mystery of what happened to Jay would haunt an entire community.

He said that the guy told him he was going to do something that he had never done before.

And reveal a most unlikely suspect.

He was giving me advice on, you know, how to stay out of trouble.

And this is what I found.

How long does it take to strangle someone?

All that before one final, stunning revelation.

Jaylee's family was concerned on the day he went missing.

By day two, they were panicked.

Jay's friend Jose monitored Jay's social media accounts.

For years, Jay had posted something almost daily.

But now, nothing.

So he was very active on social media.

As Jay's family and friends became increasingly desperate, University Police Captain Jane Mahan was pursuing her first lead, the security footage from that camera facing Jay's apartment.

She rewound it to 4.01 a.m.