15-year-old arrested at Seattle food festival shooting was armed with a ghost gun, police sayGhost guns (Photo: WSOC)SEATTLE (AP) — The 15-year-old arrested after a shootout at a food festival near Seattle’s Space Needle over the weekend was armed with a ghost gun with an extended magazine, police said Tuesday. Police Chief Shon Barnes told a news conference that the weapon was a 9 mm gun from Polymer80 — a now-defunct company that was once a leading manufacturer of ghost gun parts. Investigators also recovered two other weapons and 14 shell casings that had been fired by weapons of two different calibers, he said. The shooting in the waning hours of the three-day Bite of Seattle festival left three people dead, including a 19-year-old gunman, and at least four people injured, including a toddler. It’s unclear if the injury was related to the festival shooting or whether the person might have been involved in it, but Barnes asked for the person to come forward and speak with investigators.