DPS spokesman Tom Vinger says Moreno, who'd been a trooper for a decade, was discharged Tuesday.
Moreno says he pleaded guilty Wednesday because he was "ready to get on with my life."
Brumley says Moreno pleaded guilty to assault for choking a man during a 2009 church function. Separately, Moreno pleaded guilty to a theft charge for allegedly switching price tags at a store.
He must pay a $600 fine for the assault count and make $412 in restitution to Sam's Club.
