(Portland, OR) -- A 22-year-old developmentally delayed woman was kidnapped and sexually assaulted Monday in Southeast Portland. The woman, who lives at a group home, functions at the level of a five-year-old. Witnesses told police the suspect was in a white Dodge Truck. Officers "pinged" the victim's cell phone and about 20 minutes later located the woman about three blocks away. She was taken to a hospital for a medical evaluation. Based on physical evidence and the victim's statement, detectives say the woman was sexually assaulted. The suspect, 68-year-old Robert Bryant, was located in the Sellwood neighborhood and arrested.