Flashback...
I remember the DC Navy Yard massacre. The shooter was a computer contractor with DOD as I recall with security clearance, but got fired or resigned. Remember he still had his ID Credentials to gain easy access to the yard. Believe the shooter was also an Army Veteran, but did not receive an honorable discharge, just a general under honorable conditions.
Flagrant lawbreaker!
He has his CAC card hanging from his belt. That’s a definite security violation right there. It’s a wonder he wasn’t stopped at the front desk...