Motive - Season 2 Episode 13 -

The killer: undercover police officer Doug Slater. The victim: Samantha Turner, Sergeant Cross' current girlfriend and the prosecuting attorney in the upcoming League of Nations trial in which Mark is the star witness as the undercover cop who infiltrated the gang. Slater was also present at the scene ten years ago as a first responder in the Alfonso Dyer shooting, the truth of the shooting which has haunted Mark and Angie all these years. Samantha is found strangled to death in her apartment, with the signature League of Nations "burnt tongue" signature present. ...