Forensic Files II S01E03 - The Green Pen

Just five days before a Yale University doctoral researcher was supposed to get married, she suddenly vanished. Video surveillance cameras show Annie Le entering her workplace on the day of her disappearance, but she never left. After her body is discovered in the laboratory basement, investigators find evidence above a ceiling tile, including the perpetrator's bloody clothes. Once suspects are ruled down, DNA evidence points to lab technician Raymond Clark as her killer.