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"48 Hours" investigates the disappearance of Hannah Graham and the tireless police work that linked her alleged killer to other cases in "Hannah Graham: Deadly Connections."
British-born Hannah Graham was a student at the prestigious University of Virginia in Charlottesville.
Credit: Charlottesville Police Department
Hannah Graham, 18, was described as vivacious, athletic and talented.
Credit: West Potomac High School
Hannah Graham went missing from downtown Charlottesville, Virginia, on Sept. 13, 2014.
Surveillance video: Hannah Graham's last moments caught on tape
Morgan Harrington, 20, a student at Virginia Tech, was known for her artistic, energetic and fun-loving personality.
Credit: Harrington Family
On Oct. 17, 2009, after attending a concert at an arena on the University of Virginia campus, Morgan Harrington went missing.
Morgan Harrington was last seen on Copley Bridge alone, on foot and possibly injured.
Credit: Asena Basak
Alexis Murphy, 17, loved dancing and making people laugh.
Credit: Trina Murphy
On Aug. 3, 2013, Alexis Murphy drove from her central Virginia home to run an errand.
Alexis Murphy was last seen on surveillance footage at a gas station in Lovingston, Va.
Credit: Nelson County Sheriff's Office
Jesse Matthew attended Liberty University where he played football.
Credit: Liberty University
After college, Jesse Matthew lived and worked in the Charlottesville, Va., area.
Credit: c-ville Weekly
Jesse Matthew, 32, is believed to be the last person seen with missing UVA student Hannah Graham.
On Oct. 2, 2015, Matthew was sentenced and received the maximum of three life sentences for the attempted capital murder and sexual assault of a woman in Fairfax, Va., in 2005.
The relatives of Hannah Graham, Alexis Murphy and Morgan Harrington stand united in saving the next girl.
Credit: Jane Vance