Manuel F. Sermeno, 27, was found dead inside a burning car along Interstate 95 in Prince William County, Virginia on September 2, 1989. Investigators determined he had been shot before the vehicle was set ablaze. For years the case remained unsolved and investigators continued working to identify who was responsible.

A later investigation tied the name Alfredo R. Prieto to Sermeno’s murder while detectives were probing a series of other violent crimes. Authorities identified Prieto as the prime suspect in Sermeno’s killing, though he was never formally charged in that case. Prieto was linked by DNA to several other murders from 1988 to 1990 and was convicted and sentenced in those cases.

Does anyone have information about Manuel Sermeno’s last known movements or who might have been with him around September 2, 1989?