MESA, Ariz. – It started with a neighbor’s phone call to Mesa Police. “My neighbor threatened to blow my brains out,” the neighbor told a Mesa PD dispatcher. The neighbor is referring to 28-year-old Shawn Gagne, whose family recently filed a federal lawsuit against Mesa PD, alleging they used excessive force and violated his civil rights when they gunned him down inside his apartment on July 6, 2023.