Co-workers knew he was struggling. They didn’t expect he’d buy an AR-15.

LOUISVILLE — About a year before Connor Sturgeon gunned down his co-workers at Old National Bank in April, some close to the 25-year-old knew he was having problems.

He had abruptly turned away from his companions during a family beach vacation and began walking into the ocean, later telling his parents he briefly considered drowning himself.

Read more of Robert Klemko's reporting in the Washington Post.