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This Sept. 24, 2018, booking photo provided by the California Department of Corrections shows Samuel Little. Little, the man authorities say was the most prolific serial killer in U.S. history, has died. He was 80. California corrections department spokeswoman Vicky Waters said Little died Wednesday, Dec. 30, 2020. He had been serving a life sentence at a California prison since being convicted of three counts of murder in 2013. (California Department of Corrections via AP)