Preview Mark of a Killer: Hikers Find a Brutally Murdered Body in Los Angeles (Season 1, Episode 5) Oxygen Insider Exclusive! Create a free profile to get unlimited access to exclusive videos, breaking news, sweepstakes, and more! Sign Up for Free to View Mark of a Killer: Hikers Find a Brutally Murdered Body in Los Angeles (Season 1, Episode 5) Hikers in Franklin Canyon Park in Los Angeles discover the brutally murdered body of a young woman who appeared to have been sexually assaulted. Watch the Full Episode
