Since 2011. An occasional commonplacing of the U.S. Circuit Courts of Appeal.
Not written by a barrister. The name was thought up by a second-year American law student sitting in a coffeehouse in Manhattan. Neither an authoritative statement of the law nor legal advice. Don't rely. Quick work.
Sixth Circuit: United States v. Dallas Maynard
As the state Assault Under Extreme Emotional Disturbance statute requires the intentional infliction of injury, it is categorically a predicate violent crime.