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A 59-year-old San Diego man who was a child actor who did the voice of Charlie Brown in several “Peanuts” specials in the 1960s pleaded guilty Tuesday to threatening to hire a hitman to kill Sheriff Bill Gore.

Peter Robbins, 59, faces four years and eight months in prison when sentenced Dec. 7.

He told Superior Court Judge William Chidsey Jr. that he has been diagnosed with bipolar disorder and paranoid schizophrenia.

“I’m mentally ill,” he said. “I’ve committed no crime.”

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