Deborah Roberts

Following Riley's interrogation, he reaches out to his friends and he's really angry.

So what are you making of this?

That's when the two friends, Noah and Alex, start to realize that something's really wrong here.

What's his demeanor like?

Riley starts scheming ways that he can help his friends backpedal out of what they said.

But what Riley doesn't know, his two friends have a plan of their own.

They want justice for Emma, and to do it, they're going to have to go undercover and get it all on tape.

He said he wanted to go and throw the gun away.

The teens decide to work with police to lay a trap for Riley.

So the two friends reach out to the detectives and offer to help in any way they can.

At this point, all the police really have is circumstantial evidence against Riley.

What they needed was the gun to conclude and prove that the bullet that left the barrel that entered Emma belonged to Riley's grandfather, which meant that Riley was the killer.

They wire up the two guys with microphones, a transmitter so they can listen in, and a video camera hidden in a key fob.

So you two now offer to help the police in a sting operation.

Were you worried about that?

It's now Tuesday, the day after Emma's body was discovered.

Alex and Noah invite Riley over to play video games.

Riley starts scheming ways that he can help his friends backpedal out of what they said.

What do you say to that?

So you're playing him at this point.