Befriend and Betray (2011)

Criminal organizations succeed by enforcing a strict code of trust and loyalty. To penetrate these organizations and gain access to their inner circles the police need a magic bullet. Alex Caine is that magic bullet. Only thirty years old, Alex, who grew up hard on the mean streets of Montreal, already brings a lifetime's worth of experience (foster care, military service, prison time) to the world's most dangerous occupation: professional gang infiltrator. It is his job to befriend criminals, participate in their illegal activities, gather evidence - then live long enough to testify against them in court. Inspired by real-life events, Befriend and Betray tells the story of Alex's first infiltration assignment - the case that transformed him from a rootless young man into a highly effective, defiantly unconventional crime-fighting resource. Approached by P.C. Lau, a ruthlessly ambitious soldier for the Kam Tin Triad...