"We are not saying there is only one suspect," Seattle Police Chief Shon Barnes told reporters Tuesday. Ghost gun among 3 firearms recovered from the sceneThree firearms, including a ghost gun, were recovered from the scene of Sunday's shooting at the food festival, Barnes said Tuesday. A third gun recovered at the scene — a compact 9 mm pistol with a standard magazine — had all seven rounds still in the magazine. The 15-year-old shooting suspect is being heldA judge on Monday found probable cause to continue holding the 15-year-old arrested in connection with Sunday's shooting in secure detention. No outstanding threat, police sayA crime scene photographer arrives as law enforcement examines Sunday's shooting scene in Seattle.