recently sold it. he wasn't coming to stay here. he got a car, got inside it, pointed south. in bob durst 's own personal account he notes a visit to garberville, 600 miles from los angeles. after that we can't follow his trail. we do know that late on december 22nd or early the 23rd, susan berman was murdered by a bullet to the back of her head at her home in l.a. and on the 23rd flight records confirm bob took off from san francisco on the red eye to new york. and soon after, this letter postmarked december 23rd, showed up at the beverly hills pd. >> i call it the cadaver note. >> reporter: ah yes. the famous note directing police to her body. a note likely written by her killer. word of susan berman's murder traveled fast. >> it was like, "oh my god."