Even writing the title I am thinking yes I should.
Trying to stay vague. This happened before the most recent awful mass shouting. Which has made me think again about it.
A friend was in a relationship with this person. This person has access to guns through work/owns guns/works with the public. The person told friend I joking way (though I'm not sure how joking and I don't know anyone who would joke like that) that if she cheated on him he's shoot her, then go to his/her work and shoot as many people as he could then shoot himself. she has cheated on him and he doesn't know. They have since broken up, after a domestic incident. He was abusive (ish) but not physically. He still has access to guns. But this happened about year ago.