WASHINGTON (AP) — A week after an IT contractor gunned down 12 workers at the Washington Navy Yard, Navy officials began moving to close gaps in the security clearance process, recommending that all police reports involving an individual must be included when a background check is done.

The Navy, in a report released Monday, revealed that the shooter, Aaron Alexis, did not disclose a 2004 arrest or some financial problems when he filled out his application for a security clearance when he joined the Navy as a reservist several years later. And officials said the background report given to the Navy at the time, also failed to reveal that he had shot out the tires of another person’s car during a 2004 dispute in Seattle.