Susan Jane Berman, a journalist and author and the daughter of mobster David Berman, was found dead in her Beverly Hills home on December 23, 2000. She was 55 years old. Reports state she was shot execution-style, a detail that linked her killing to methods associated with organized crime.

Berman had written about her father’s mob ties and was described as a longtime friend of real estate heir Robert Durst. Prosecutors later argued Durst had motive related to the disappearance of his first wife and pointed to handwriting links involving the word cadaver; those developments drew major public attention to the case years after the slaying. The investigation remained unsolved for over a decade.

What information might still help clarify who killed Susan Berman or the circumstances that led to that execution-style shooting?