SAN RAFAEL, Calif. (AP) — Prosecutors say a Northern California man has pleaded guilty to making death threats against Sen. Barbara Boxer.Marin County Deputy District Attorney Aicha Mievis tells the Marin Independent Journal ( ) that 47-year-old Kevin Joseph O'Connell entered the plea on Monday to a charge of threatening a public official. The charge was reduced to a misdemeanor in exchange for the plea.Authorities say O'Connell threatened Boxer in a voicemail he left at her San Francisco office in July. He allegedly claimed he was being harassed by authorities and was in a dispute with his neighbors.San Rafael police have said the death threat wasn't related to Boxer's political positions.O'Connell's lawyer, Deputy Public Defender Bonnie Marmor, described the call as a cry for help.___Information from: Marin Independent Journal,