"Billy" was a nickname given to an unidentified skull that was kept in a California police department.
Case[]
On November 17, 1980, a new police officer in Modesto, California discovered that the Sheriff's Department had been keeping an unidentified skull that had allegedly been found in the city of Richmond on an unknown date. The skull had the name 'Billy' written on his forehead in ballpoint pen. The Sheriff's Department then turned the skull over to Contra Costa County, who ruled Billy was a young Asian man who likely died in 1973.