A Santa Rosa man has pleaded no contest to assault and sexual battery charges on a woman he chained to the floor of the bedroom in his mobile home. John Manuel Negrete-Gomez, 59, was charged with ten felony counts including oral copulation by force, penetration with a foreign object by force, false imprisonment, criminal threats, possession of a controlled substance for sale, possession of a controlled substance, assault with a deadly weapon causing great bodily injury, and sexual battery. He pleaded no contest Wednesday in Sonoma County Superior Court to the assault, sexual battery and one of the drug possession charges two days before his scheduled preliminary hearing. The alleged sexual acts occurred Feb. 9-12, the Sonoma County District Attorney’s Office said. Sheriff’s deputies found the 40-year-old woman tethered at the ankle to a bolt in the floor of Negrete-Gomez’s south Santa Rosa mobile home and evidence of methamphetamine sales, the Sonoma County Sheriff’s Office said. The woman told sheriff’s detectives she was beaten and sexually assaulted for three days until she managed to call for help. Judge Kenneth Gnoss indicated he would sentence Negrete-Gomez to seven years and eight months in prison and require him to register as a sex offender when he is sentenced Sept. 1. The remaining seven counts against Negrete-Gomez are to be dismissed at sentencing.