He could have, easily. He was able to roam around unmolested by law enforcement or security from 7:30 until he killed himself almost 8 hours later.
Law enforcement didn't even figure out what his name was until almost 24 hours later.
If his intent was to kill his girlfriend and escape, he could have hopped in a car at 7:30 and taken an international flight out of DC or even Atlanta before they even knew who they were looking for.
At the time he shot himself, he had yet to see or come in contact with a security guard or a policeman.
Where in the world did you get the idea it was 8 hours between the first shooting and his suicide? Try ‘less than 3 hours’.
He killed himself sometime before 10:15AMET.
'Law enforcement didn't even figure out what his name was until almost 24 hours later."
They knew his name in less than a 1/2 hr after he killed himself and were at the gun store where he bought the guns in about an hour later.
"If his intent was to kill his girlfriend and escape, he could have hopped in a car at 7:30 and taken an international flight out of DC or even Atlanta before they even knew who they were looking for."
I don't think it was his g/f. The g/f's immediate ex is someone else.