This episode is brought to you by Tinder.

Life is full of possibilities.

A cheeky reply to a message here could lead to a world of fun new experiences

over there and with Tinder it all starts with a swipe.

Strangers can become mates, mates can become lovers with matching tattoos

or maybe it's not that serious.

Whether a match leads to something new and exciting or something personal,

no matter what, all matches lead to self-discovery.

Download Tinder now.

Never in a billion fucking years.

Never would I ever think this kid is capable of ever doing something like this.

He would never do this.

This is Katie. She's from my hometown Ringwood, New Jersey.

We're hanging out at a house party, taking shots at the kitchen table

because there's just really nothing else to do in our town.

And inevitably the conversation turns to Zach Worcester, our classmate and accused murderer.

Wait, so what did you say before?

I said, I dated Zach, end of a summer, into fall.

So what did you find out that he was involved in this crime?

I found out from my best friend who also knew him.

I literally, my jaw was on the floor.

I was like, no.

...