Suspected LA gunman may have been responding to Craigslist ad Oct. 24, 2012: Police investigators talk to people across the street from a family-owned business, United States Fire Protection Services, in Downey, Calif.AP DOWNEY, Calif. - The suspect who was arrested Friday in the killing of three people and wounding of two others in suburban Los Angeles may have been responding to a Craigslist ad to sell a car placed by one of the victims. Jade Douglas Harris had been detained and questioned Thursday after a stolen black Camaro was found in Los Angeles, about 20 miles north of suburban Downey, where the shootings occurred. The Los Angeles Times reports that he was booked Friday on charges of murder and non-negligent manslaughter. Police haven't given a motive but said they don't believe the killings were a random act of violence. Martha Zerehi, a spokeswoman for the business, says the suspect had gone to the shop Wednesday after responding to an ad on Craigslist for the Camaro.