Gunman who triggered lockdown at White House identified as 21-year-old Nasire Best

The gunman who triggered a lockdown at the White House on Saturday evening has been identified as 21-year-old Nasire Best, according to law enforcement. Officials said Best was already known to the Secret Service and had previously been ordered by a court to stay away from the White House grounds. President Donald Trump was in the Oval Office at the time of the shooting.