A seemingly random decision, to take the Greyhound from B.C. to Winnipeg rather than a friend’s offer of a plane ticket, would cost 22-year-old Tim McLean his life and profoundly change the lives of those who witnessed his murder. On Greyhound 1170, Vincent Li, a diagnosed schizophrenic on his own randomly chosen bus journey, sat beside McLean and then, obeying voices inside his head, repeatedly stabbed and then cannibalized McLean’s body. The Fifth Estate recounts the story from the perspective of two of the surviving passengers, a truck driver who stopped to help, forensic psychiatrist Dr. Stanley Yaren, and Tim McLean's family. His father, stepmother and mother still struggle today to understand why the RCMP stood outside Bus 1170 for five hours, as Li cut up their son’s body, before intervening.