An anonymous note was sent to Beverly Hills police at the time that alerted them to “a cadaver” in her house.

That letter is at the center of an HBO documentary series about Durst, who was charged Monday in Berman’s killing.

The HBO filmmakers uncovered a second letter that Durst admitted writing to Berman. That letter had a similar block style printing as the cadaver letter and contained the same misspelling of “Beverley.” The filmmakers at some point provided that information to Los Angeles police.