Columbus police are warning Hilltop residents to lock their doors and windows after receiving a dozen reports of someone breaking into homes and touching or watching women as they sleep. Columbus Police Sergeant David Pelphrey says multiple suspects may be committing the crimes. Eleven incidents have taken place on the Hilltop and one in Franklinton. Pelphrey says some of the cases date back to December and involve victims of various ages. He says Police are asking the public for assistance and have set up a tip line to catch the suspect or suspects.