San Luis Obispo police said Friday they were searching for a 22-year-old homeless man suspected of assauting a woman near Prado Road. The woman, Lisa Allyson Rives, 38, was found at about 6 p.m. lying next to the creek in the 100 block of Prado Road, police said. She was semiconscious and bleeding from the head and was taken to French Hospital, San Luis Obispo police said in a statement. Rives is also homeless, police said. Late Friday police were looking for Ryan James Verhault, 38. He hit Rives in the head with sticks and rocks, according to a police statement.