What workplace violence perpetrators have in common, new Secret Service report finds

It's the first report released by the U.S. Secret Service on workplace violence.
In 2017, a man opened fire on his estranged wife, a special needs teacher at an elementary school in San Bernardino, California, killing her and a student before taking his own life.
The man who carried out the attack had a history of domestic violence, according to the U.S. Secret Service, which in a first-of-its-kind report is detailing common "behaviors of concern" it says are often exhibited before attackers carry out violence.
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