A man who pleaded guilty to stalking a La Jolla plastic surgeon and threatening his ex-girlfriend in 2013 has pleaded guilty to attempting to threaten San Diego County Sheriff Bill Gore and making a criminal threat to the manager of an Oceanside mobile home park. Peter Robbins will be sentenced Dec. 7 and was told he would likely receive a prison term of four years and eight months. A visiting San Diego Superior Court judge told Robbins he would receive no extra time for breaking probation conditions on his 2012 case. As a child, Robbins was the voice of cartoon character Charlie Brown in numerous Peanuts television specials in the 1960s. All local judges removed themselves from hearing Robbins’ new case after Deputy District Attorney Brenda Daly filed a charge in September that claimed he made a criminal threat to Judge Robert O’Neill. That charge was dropped last week when he pleaded guilty to other charges. Robbins, 59, was arrested Feb. 25 by the probation department for violating terms of his probation, and he admitted to visiting retired Los Angeles Judge William Chidsey, Jr. that he violated probation conditions. Robbins has made many outbursts in court and some months ago told O’Neill that he “should be held in a room and forced to watch Lawrence Welk reruns,” among other comments. Another judge found he was mentally competent to stand trial. The threat to the sheriff was indirect, and there was no evidence he could carry it out, said Daly. In court, Robbins told the visiting judge he regretted any statement he made about the sheriff, saying he was “mentally ill” at the time. In 2013, Robbins demanded the return of money he paid for breast enhancement surgery for his girlfriend and pleaded guilty to stalking the La Jolla plastic surgeon. He is on a 10-year restraining order barring contact with her. He was initially arrested in 2013 for refusing to pay for his meal at a La Jolla restaurant, and the other charges were filed days later. – Neal Putnam