Claim: Says that "perpetrators of domestic violence accounted for 54% of mass shootings between 2009 and 2016, according to the advocacy group Everytown for Gun Safety."
Fact-check: Do half of mass shooters have history of domestic violence?
Verdict: false
Organisation: PolitiFact
Author: W. Gardner Selby
Date published: 2017-12-03T00:00:00