The Zodiac killer has never been found, though there are several suspects. The suspect most often cited is Arthur Leigh Allen (1933–92), a Vallejo, California, schoolteacher who had been institutionalized in 1975 for child molestation, though his identification with the Zodiac killer has never been substantiated. In 2021 a group of investigators claimed that Gary Francis Poste, a house painter who died in 2018, was the killer. The offered evidence included several witnesses who claimed Poste had admitted to the murders and scars on Poste’s forehead that matched witness descriptions of the killer. However, law enforcement officials rejected the claim, and the FBI investigation remains ongoing.
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