Monterey County sheriff’s investigators are trying to locate a man who they believe sexually assaulted a 15-year-old girl in a creek bed late Tuesday night.King City resident Gregory Andrew Morgan, 20, is suspected of luring the girl into a creek bed near a mobile home park on Pine Canyon Road and sexually assaulting her at around 10:30 p.m., according to the sheriff’s office.The man and the girl are acquaintances, Monterey County sheriff’s Cmdr. Mike Richards said. The victim told investigators she attempted to resist the assault but submitted when Morgan became aggressive, according to the sheriff’s office. She was taken to Natividad Medical Center in Salinas to be examined.Gregory is still at large. He is described as Hispanic, about 6 feet tall and 180 pounds, with brown hair and brown eyes. His last known address is on Lynn Street in King City. A countywide bulletin about the assault has been issued by the sheriff’s office. Anyone with information on the case or on Morgan’s whereabouts should contact the Monterey County Sheriff’s Office at (831) 755-5111.