S12E10 — Killing Time

The third victim of the Mt. Thomas serial killer is a gay teacher named Leon Barclay. PJ and Amy discover a link between him and the second victim - Merinda May: a therapy group for sexual abuse victims, run by Dr. Bill Lapscott a psychologist. What makes them worried about this link is that the first victim did not attend, so Amy infiltrates the group to see if this could be how the victims were chosen. As the group share stories of their own sexual abuses, Amy gives one also. While she later insists she was making it up, Bill recognises the signs and knows that she wasn't. He invites her out, and begins getting to know her. Garth, however, begins to spect that Bill himself is the killer - a theory that seems cemented when they learn that Bill lived in the same street as Janelle Watts, the first victim. Amy doesn't believe this theory, so she desperately tries to prove otherwise and ends up suspecting Jeff - Janelle's father - as being the killer. Meanwhile, Bill asks Amy out and they