Episode 1 - The Murders of Erin Gilmour and Susan Tice

In December 1983, Erin Gilmour was discovered dead in her apartment. She had been sexually assaulted and brutally stabbed. 4 months prior, Susan Tice was murdered in the exact same manner. It would be many years later that police would discover  the same man was responsible for both of these crimes. Was he responsible for more?