Aaron Alexis had a security card that allowed him access to the Washington Navy Yard, and shot his way into an office building there by killing a police officer at the base and grabbing his handgun, military officials said Tuesday.
One day after Alexis, a former Navy reservist who was working as a civilian contractor, shot 12 people to death and wounded eight others, authorities were trying to piece together the details of his security clearance.
They were also looking for a motive and putting together a profile. Alexis, 34, appears to have had a history of psychological problems and was deteriorating, and military officials said he had a disciplinary record that included insubordination and disorderly conduct.
Further in his past, Alexis was accused three years ago of accidentally firing a bullet into an upstairs apartment, and nine years ago of shooting the tires of another person’s car during an anger-fueled blackout.
Alexis was killed, ending the rampage Monday, after exchanging fire with officers who stormed the headquarters of the Naval Sea Systems Command.
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