In August of 1973, a 22-year-old woman was beginning her graduate degree in psychology at the same Missouri university when she was brutally murdered in her apartment. Originally, police believed the crime was committed by a woman. Or, a professor she may have been seeing on campus. Now, 52 years later, even more curious potential suspects have come into play, as a whole new investigation is underway. This is the murder of Tess Hilt.

In July of 2023, a beloved elementary school teacher took a walk through her Maryland neighborhood, just as she did every evening. But this time, she never came home. Within days, her disappearance sparked a massive search effort involving local authorities and concerned volunteers alike. As the weeks wore on, eerie details surfaced, including a photograph of the murder suspect as he was disposing of her remains. This is the murder of Mariame Toure Sylla.

In the spring of 2009, a short-lived spree of attacks against women in Boston and Rhode Island had the Eastern Seaboard on edge. But when a suspect was finally identified, the revelation was almost too bizarre to believe: a clean-cut, promising medical student with a seemingly perfect home life. As investigators dug deeper, they uncovered a dual existence darker and more calculated than anyone who knew him could have possibly imagined. These are the crimes of the Craigslist Killer, otherwise known as Philip Markoff.