Just a few months after the tragedies in Aurora and Oak Creek, the latest act of mass gun violence took place outside of Milwaukee, Wisconsin yesterday.

Radcliffe Haughton opened fire at the salon where his estranged wife works, killing three women and injuring four others, before turning the gun on himself. While details are still coming out, the police are already pretty sure that “this incident is domestic violence related.” Earlier this month, Haughton allegedly slashed the tires of his wife’s car. Just last week she got a restraining order against him and he was ordered to turn his weapons over to the sheriff’s department.

The Brady Campaign to Prevent Gun Violence has a slew ...