Bullets that killed 2 at Seattle festival not from 15-year-old's gun

Key Points:

• Preliminary findings indicate that the bullets killing two victims at the Seattle Bite of Seattle festival did not come from the gun carried by the 15-year-old suspect in custody, according to newly filed court records.
• The shooting on July 26 resulted in three deaths, including two bystanders and a 19-year-old believed to be associated with the teen suspect; multiple others, including a toddler, were also injured.
• Investigators found 13 shell casings at the scene, suggesting four different handguns were used, and autopsy evidence excludes the teen's Polymer80 "ghost gun" as the weapon that killed the two bystanders.
• The 15-year-old suspect faces charges of first-degree assault with a firearm enhancement and unlawful possession of a firearm, with prosecutors seeking to try him as an adult; the investigation into the full circumstances and additional suspects continues.
• Police suspect the shooting is linked to gang violence and are searching for another unknown suspect involved in the incident.