The gunman who killed 12 people at the Washington, D.C., Navy Yard on Monday began his rampage by heading directly to the fourth floor, where he shot people who worked with him, and authorities are investigating whether a workplace issue prompted the killings, the Washington Post reports. People in the department where Aaron Alexis was working had concerns about his job performance, and investigators are looking into whether those concerns escalated last week.
“He was not doing a very good job, and somebody told him that there was a problem,” one law enforcement official said. “Our belief is that the people who were shot first were people he had issues with where he worked, people he had some sort of a dispute with. After that, it became random. . . . After the first shootings in that office, he moved around and shot people he came upon. They were then targets of opportunity.” Alexis, a former Navy reservist who had mental problems, worked for a company contracted to upgrade computers at the Navy Yard.