They may start looking disheveled at work. Almost certainly they'll be more irritable or depressed. The old saying 'an eye for an eye' means that if someone hurts you, then you should hurt that person back. That's a personality trait. People are that way from childhood.
Violence is the last step in somebody feeling alienated, cut off, unheard and unseen.
If you intervene at any point in that process and say to the person, 'Tell me what's going on,' 'tell me your story,' you're going to interrupt that process. In most cases, you're going to be able to avert that risk because most people don't want to go through with it. They do it as a last straw because they feel like it's the only way they're going to be able to get anyone to pay attention to them. McIntyre suggests that both pre-employment personality testing and the steps that Braverman favors, may be the best answer. Doing so, of course, doesn't guarantee an employer can avoid the sort of event that rocked Wakefield on Tuesday, says Braverman.