India, Nov. 12 -- The suspect in the mass shooting at Washington D.C.'s Logan Circle, was identified as Dr. Matt Lambert, NBC News confirmed citing two federal sources.

Jeff Caroll, the interim chief of Washington D.C.'s Metropolitan Police Department (MPD) confirmed that the suspect owned the apartment where he had barricaded himself. Carroll said that the suspect died from a self-inflicted gunshot would that was fatal.

Matt Lambert, the deceased suspect, was on the phone with the deputies during the standoff. Carroll said that at one point, they heard a gunshot wound, after which the voice on the suspect's side went silent.

Dr. Lambert first shot one person at the VIDA Fitness gym. He then stepped out and shot people in the nearby ar...