>> i know my sister would've fought. we used to tell each other that if someone ever tried to hurt us that we would do everything we can to leave something behind, so the other one can figure it out. i believe that she was murdered. >> this is a very bizarre death. >> it was baffling from the start. a young woman dead at her millionaire boyfriend's mansion. >> 9-1-1 what are you reporting ? >> i got a girl, hung herself. >> my heart started racing. >> you found her. >> i did. >> detectives ruled it a suicide, but was it? >> at the scene knives, rose, a cryptic phrase. >> her hands were tied, she was naked. >> this was sending a message. >> that wasn't the only suspicious death here. >> no mom wants to hear that her son was a victim of a homicide. something happened at the top of the stairs. >> what really went on in that mansion.