Cities sue 'ghost gun' parts manufacturers as homemade firearms are tied to more crimes – USA TODAY
In San Diego, a shooting spree in April killed one man and injured four others.
In Brooklyn, New York, a 17-year-old student is accused of trying to smuggle a loaded gun into a public high school earlier this month.
And in Douglas County, Georgia, just west of Atlanta, the sheriff says a 13-year-old boy shot and killed his sister by mistake in late November.
