Did millionaire real estate heir murder 'best friend' because she knew he killed his wife?

Summary: Robert Durst, the wealthy New Yorker who was the focus of the HBO show "The Jinx," goes on trial in Los Angeles soon for the murder of a close friend he allegedly killed 18 years ago. Prosecutors theorize that Durst killed Susan Berman because she was about to be questioned by New York police in a renewed investigation into the 1982 disappearance of his first wife, Kathleen "Kathie" Durst. Nancy Grace looks at the case against Durst with experts including Gary Greenberg, Co-Author of "Sex and the Serial Killer: My Bizarre Times with Robert Durst," defense lawyer Ray Guidice, psychologist Caryn Stark, forensics expert Karen Smith, and reporter Robyn Walensky,  See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.