
The gunman who killed one and injured four in a mass shooting in Washington, D.C., Thursday was in Orlando just days before the attack.
Officials have identified the shooter as Matt Lambert, a 55-year-old emergency room doctor who lives in D.C.
Lambert shot five people at a gym near his condo complex Thursday. Officials say the attack stems from a dispute with building management. Jeff Carroll, the Metropolitan Police Department’s interim chief, said the man killed in the shooting was the condo building’s manager.
Lambert shot and killed himself after opening fire in the gym.
Officials have confirmed Lambert had three firearms and used all of them in the shooting. They say the weapons are not registered under Lambert’s name in D.C. It’s not yet clear where he purchased the guns.
Attorney Joel Braithwaite represented Lambert in a legal battle against his D.C. building’s management team, which cost the shooter $300,000 in legal fees and maintenance. Braithwaite also told NBC News he spoke to Lambert on the phone Tuesday and that he seemed to be doing well.
That was the same day, Braithwaite said, that Lambert was in Orlando presenting at a medical conference.
The doctor was supposed to start a new job the following week, Braithwaite said.
Braithwaite told NBC he learned about the mass shooting from a reporter, and he did not know Lambert was in possession of a firearm.
This is a developing story.

