WorldPolice 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.Ghost guns are privately made firearms that lack serial numbersThe Associated Press · Posted: Jul 28, 2026 4:07 PM EDT | Last Updated: 1 hour agoListen to this articleEstimated 1 minuteThe audio version of this article is generated by AI-based technology. Mispronunciations can occur. We are working with our partners to continually review and improve the results.Seattle police arrest 15-year-old in connection with deadly festival shootingJuly 27|Duration 3:50Police said Monday there were at least three suspects involved in a shootout at a food festival near Seattle's Space Needle over the weekend, including one who was among those killed and a 15-year-old who has been arrested. The violence left three people dead and at least four others, including a toddler, injured.The 15-year-old arrested after a shootout at 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 calibres, he said.Ghost guns are privately made firearms that lack serial numbers used to trace them and are often purchased without a background check.Law enforcement officials say ghost guns have increasingly been used in violent crimes across the U.S.