Debra Roberts

He knew about Liam's plan and agreed to help move Sarah's body.

Detective Weisbrot.

From there, as the tape records, Liam tells Anthony the pair drove to the Belmar Bridge in separate cars.

Liam drove Sarah's silver Oldsmobile.

Preston drove his own car.

Liam describes how he positioned Sarah's body to sit up in the passenger seat to look like she was sleeping.

They use walkie-talkies to communicate.

Liam even takes one out of his pocket to show Anthony.

He says the plan was to throw Sarah off the bridge, then jump over the divider, where Preston was waiting on the other side, and drive off.

But when they got there, Liam underestimated how much a body could weigh.

So Liam says Preston drove to his side of the bridge to help.

And together, they threw Sarah's body off the bridge.

On the recording, Liam goes on to say he spent six months planning Sarah's murder.

He mapped out the security cameras in her neighborhood.

He'd watch how she pulled in and out of her driveway.

He planned how he would dispose of her body and how he was going to make the police believe they were better friends than they were.

But what he didn't count on was walking away with so much less money than what he was expecting.

Not only was it not as much money as he'd hoped, he thought it was basically unusable.

In the video, you can see Liam lean back in his seat and stare out the windshield.

He's just told Anthony his biggest secret, that he killed his childhood friend for money.