The department opened a criminal investigation after a couple said they were shocked with a stun gun and beaten during the Aug. 5 encounter.

Tempe Police Chief Ken McCoy defended his department's use of Flock automated license plate readers, or ALPRs, as questions about privacy and data sharing follow police departments across the Valley.

When the anonymous "Konner Culver" account was tagged in a comment the city thought was a threat, police used myriad search warrants to unmask him.

Rounds tore into a parked car and a nearby building Saturday afternoon near Lemon Street and Stanley Place in Tempe, just blocks from Arizona State University, but police say no one was hurt in the gunfire.