The gun was owned by Arizonan Jesse Kitagawa Jr., 45, who allegedly sold it to a suspected California gunman, 56-year-old Glenn Litton, police said.

The detectives determined that Kitagawa then sold the ghost gun to Litton on April 10 at a motel in Chandler, Arizona, which is a violation of Arizona law because it’s illegal for Kitagawa to possess a firearm as a convicted felon.

Buckeye, along with a number of other metro Phoenix cities, are beginning to crack down on the use of illegal fireworks. The Buckeye City Council passed a city code amendment Tuesday that doubles the previous fine.

The gun used to critically injure two elementary school students in Butte County was a modified weapon — also known as a ghost gun — the shooter bought from a felon in Arizona, officials said Tuesday.