'Peanuts' voice actor Peter Robbins sentenced to 4 years in prison

SAN DIEGO, Dec. 9 (UPI) -- Peter Robbins, the voice of Charlie Brown, has been sentenced to four years and eight months in prison for making criminal threats.

The sentencing took place Monday after Robbins pleaded guilty to the charges in November, admitting to a San Diego courtroom that he threatened to hire a hitman to kill local sheriff Bill Gore.

The 59-year-old actor told Superior Court Judge William Chidsey Jr. that he had been diagnosed with bipolar disorder and paranoid schizophrenia, according to the Los Angeles Times and said: "I'm mentally ill. I've committed no crime."

The former Peanuts star previously had run-ins with the law in 2013 when he was arrested while trying to cross the U.S-Mexico border. A felony warrant was out for Robbins at the time who later pleaded guilty to threatening an ex-girlfriend and her plastic surgeon.

Robbins was the voice of Charlie Brown in several Peanuts specials in the '60s including A Boy Named Charlie Brown, A Charlie Brown Christmas and It's the Great Pumpkin, Charlie Brown.