Sandra Ehramjian was 21 and living in Cambridge, Massachusetts, when she left on November 27, 1972, intending to hitchhike to her family’s home in New York. Her body was found the next day in a park in Brockton; an autopsy determined she had been sexually assaulted and strangled. Her death was linked to a series known at the time as the Hitch-Hike Murders.

A December 1972 police chase and shootout led to the arrest of driver Anthony J. Jackson, who was later indicted in several of the killings. At Sandra’s trial a witness said they saw her enter a car matching Jackson’s vehicle, and an FBI chemist testified that hairs found in Jackson’s car were consistent with Sandra’s. Despite that evidence and Jackson’s convictions for other murders in the series, a jury acquitted him of Sandra’s murder and rape.

Sandra’s death was ruled a homicide; legally, who killed her was left unresolved. Did anyone who knew Sandra or saw her in late November 1972 have information that could help answer what happened?