Kaelyn Moore

And that brings us to our second clue, the doorbell camera footage.

Detective Richard Spitler found the exact moment that Moe was shot on a neighbor's continuously recording doorbell camera that also captured audio.

While this recording just showed the front porch, he was able to hear screams, thus indicating Moe's last moments.

He heard a scream, two shots, a six-second silence, and then a third and final shot.

And these audible shots line up with those three casings that were found in the apartment.

This video also gave Detective Spittler a very specific time of death, 9.15 p.m., just an hour before her friend, Caitlin Cash, got home.

The security camera audio, along with Moe's examination, put together a clearer picture of how things likely played out between Moe and her attacker.

The next description of Moe's injuries are a bit graphic, so please skip ahead a little bit if you can't handle that today.

Detectives learn that Mo Wilson had been shot those three times, shot one to the front of the head, shot two to the side of the head, which also passed through Mo's right index finger as it traveled and also left a cut on her hand, almost as if her hand was up to block.

Investigators believe Mo was on the ground after those first two shots.

Then there was a six-second pause, six seconds.

One, two, three, four, five, six, before a final shot was fired through her heart.

Whoever did this stood over Mo after she had already been down and fired that final time to make sure she was not getting back up.

That six-second pause told police a lot.

This wasn't a panic killing.

That pause meant it wasn't just a quick reaction.

This was a very deliberate choice.

And I counted them out because when you count them out, you realize how long six seconds can be in that moment.

You know what you're doing.

After this, investigators know, like, we've got to canvas harder.