One of the first things we learned about Omar Mateen, the gunman in the nightclub massacre in Orlando, Fla., was that his ex-wife said he had beaten her severely until she left him in 2009.
If it sounds familiar that a gunman in a mass shooting would have a history of domestic violence, it should.
In February, Cedric Ford shot 17 people at his Kansas workplace, killing three, only 90 minutes after being served with a restraining order against his ex-girlfriend, who said he had abused her. And Man Haron Monis, who carried out a 17-hour siege at a cafe in Sydney, Australia, in 2014, in which two people were killed and four were wounded, had terrorized his ex-wife. He had threatened to harm her if she left him, and was eventually charged with organizing her brutal murder.