Maryland

Hadden Clark was convicted of murdering 6-year-old Michele Dorr in 1986 and 23-year-old Laura Houghteling in 1992, and remains a suspected serial killer with multiple unproven confessions.

The D.C. Sniper Attacks were a serial shooting spree in October 2002 that killed 10 people across the Washington D.C. area, committed by John Allen Muhammad and 17-year-old Lee Boyd Malvo.

The Sister Cathy Cesnik case is an unsolved 1969 American homicide in which a 26-year-old Baltimore nun and teacher vanished in Catonsville, Maryland, and was found killed weeks later.

The Sean Suiter case is a disputed 2017 death investigation in which a Baltimore homicide detective was found shot in the head in a vacant West Baltimore lot one day before a federal grand jury appearance.

In the early morning hours of March 3, 1993, a family was murdered in their Maryland home in what appeared to be a robbery gone wrong. But investigators would uncover a chilling scheme: a father willing to kill his own disabled child and ex-wife for access to a multi-million-dollar trust fund.

Joseph Roy Metheny operated as a serial killer in Baltimore during the 1990s, claiming to have murdered up to ten people. Known as 'Joe the Cannibal' and 'The Cannibal Cook,' Metheny was convicted of two murders and died in prison in 2017, leaving a trail of unproven confessions and alleged victims.