S14, E1: A teenage girl is found dead in an alley, with evidence of strangulation, blunt force to the head and sexual violation. She is Sally Galan, a 17-year-old who had been out drinking with her boyfriend, left the bar quite upset and never came home. M.E. Rodgers says that the bite marks on Sally's breasts were eerily similar to an unsolved case in Brooklyn five years ago. Briscoe and Green talk to the detective on that case and the best they can come up with is it was another teenage girl who disappeared on her way home from the library. At the time, there was a mysterious man at the library and they had a sketch. The detectives show that sketch to Julie, a waitress at the bar. She confirms it could have been someone she saw following the victim out of the bar. They are also concerned that he could be a serial killer as there are numerous unsolved missing teenage girl cases, which were all outside and walking distance from home when they disappeared.