MANTECA — A man wanted in the stabbing of a woman Saturday at Caswell Memorial State Park on Saturday morning turned himself in to authorities about 9:40 p.m. Tuesday at a Manteca McDonald's, according to the San Joaquin County Sheriff's Office.Manteca resident Juan Samuel Chavez, 35, was booked into the San Joaquin County Jail for attempted murder, burglary, false imprisonment, criminal threats and assault to commit a sexual act, authorities said.