When we first encounter Chavin, he's singing "Ol' Man River" while shuffling down the streets of Boca Raton, Fla. He goes into detail about his friendship with Durst, laying the groundwork that explains his conflicted feelings when it came to turning on his once best friend. While Durst was in jail, Chavin spoke to him several times but he never revealed which way he was leaning. Many of their chats were walks down memory lane.

The two met through Susan Berman, the woman Durst was eventually convicted of killing. Although the three of them were very close, Chavin was determined to stay out of the legal troubles Durst was in. John Lewin, the lead prosecutor on the case, was contacting all of Durst's friends. Chavin managed to dodge his calls for a while until Lewin switched tactics and went through his boss. At that point, Chavin knew he couldn't avoid Lewin any longer.

When Lewin finally spoke to Chavin and asked him outright if he thought Durst killed Berman, he cryptically said, "That's one I'm not gonna answer." Lewin also reached out to Chavin's wife, Terry Chavin, who was very cooperative. She never liked Durst and always suspected he was involved in the deaths of his first wife Kathie, as well as Berman's. A tip from her about a strange dinner Chavin had with Durst one night led to a follow-up call from Levin.

After much back-and-forth with himself, Chavin knew he had to do the right thing. As conflicted as he was regarding his closeness to Durst, he was equally as heartbroken over Berman's murder. She wasn't just a friend. Berman was a surrogate mother to his children and was very close to his family. Ultimately, Chavin decided she was owed something. It's clear he's going to tell Lewin something that he knows and the implication is, Durst killed Berman and he knew about it. "Friendships die hard," he said.