WASHINGTON (AP) — U.S. officials say the former Navy reservist who gunned down 12 people at the Washington Navy Yard had a string of misconduct problems during his nearly three years in the military, but he received an honorable discharge.

The officials say that Aaron Alexis, 34, had bouts of insubordination, disorderly conduct and was sometimes absent from work without authorization. The offenses occurred mainly when he was serving in Fort Worth, Texas, from 2008-2001, and were enough to prompt Navy officials to grant him an early discharge through a special program for enlisted personnel.