A 59-year-old San Diego man who as a child actor 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 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."
In 2013 he pleaded guilty to threatening a former girlfriend and the surgeon who did her breast augmentation and was given probation. He later was found to have violated his probation and served four months in jail.
Among his probation violations, prosecutors said, were drinking alcohol, failing to finish a domestic violence class and cutting off his GPS tracking anklet.
When arrested, Robbins was living in Oceanside with his dog, Snoopy.
Robbins has managed real estate in Van Nuys, hosted a radio talk show in Palm Springs, and made an appearance at the 2008 Comic-Con convention in San Diego.
As a youth, Robbins had appearances on several television shows, including "My Three Sons" and "Rawhide."
In September, he was charged with threatening the sheriff, a judge and the manager of a mobile home park.