Investigators examining the deadly Bite of Seattle festival shooting have recovered three handguns, including an untraceable 9mm "ghost gun" and a firearm equipped with a 40-round magazine, Seattle police Chief Shon Barnes announced Tuesday. The first weapon seized was a Polymer 80 9mm ghost gun — a homemade, untraceable firearm lacking a serial number. Ballistic testing, suspect investigation continuesDig deeper:Police believe the Polymer 80 ghost gun and the Glock Model 45 were both used in the violence. Barnes noted Tuesday that authorities do not believe the weapons were stolen, though a formal trace on the ghost gun is ongoing. The Source: Information in this story came from the Seattle Police Department and original FOX 13 Seattle reporting.