Herbert Farley, 65, and his wife Lula Mae Farley, 71, were collecting recyclables behind a supermarket in Ontario, California, when they were attacked in June 1990. Lula Mae was shot and killed in the alley; Herbert was abducted and later found shot to death in Rubidoux.

Authorities later identified Alfredo Prieto, described as a 44-year-old Pomona Northside gang member, as the suspect. Ballistics testing linked the weapon used in the Farleys killings to the double homicide of Stacey Siegrist, 19, and Anthony Gianuzzi, 21, one month earlier. Investigators connected Prieto to multiple killings in California and Virginia from 1988 through 1990.

Prieto had been sentenced to death in 1992 for the rape and murder of Yvette Woodruff, 15, in Ontario, and was convicted of two Virginia murders from 1988 that were tied to him by DNA. The Farleys case went unsolved until forensic advances linked Prieto to the crime.

If anyone knew Herbert or Lula Mae, or remembers the area behind that supermarket in June 1990, can you share what you know?