John Abono, 22 and a resident of Concord, California, was reported missing on December 22, 1975. He was later identified as one of the earliest known victims linked to a string of murders attributed to John Sapp.

Investigators say Abono had been involved in a drug-related transaction with Sapp and was described as a marijuana buyer. In April 1986 Sapp was arrested on an unrelated firearms charge; during questioning he confessed to multiple killings, including Abono’s. Authorities later confirmed Abono had been murdered in Contra Costa County and charged Sapp with first-degree murder. Court records show Sapp was convicted in 1991 for the murders of Abono, Elizabeth Duarte and Robert Weber, with findings that he personally used a firearm in each killing.

Does anyone have memories of Concord in late 1975 or information about Abono’s life and movements before he disappeared?