HOUSTON (AP) — At first, all forensic anthropologist Sharon Derrick had to solve the mystery of ML73-3349 was the body of an unidentified boy, found dead more than 35 years ago, the voluminous police files from a decades-old serial killings and a desire to give a name to the nameless victim.

Now, two years after she first began the search, ML73-3349 has a name: Randell Lee Harvey. And Harvey’s family has the answer they’ve waited a generation to have.

Derrick knew that ML73-3349 was one of three still-unidentified victims of notorious Houston serial killer Dean Corll and his two teenage accomplices, who had tortured and killed 27 young boys in the early 1970s.

ML73-3349 was found on Aug. 8, 1973, in a makeshift grave in a Houston boat stall, where 17 of Corll’s victims had been buried, the day that Corll was shot and killed by accomplice Elmer Wayne Henley.