Suspect showed signs of mental problems ← Related Article Visit The Boston Globe Share on Twitter Share on Facebook Comment on this Scroll to top of page greg kahn/getty images People in Washington held candles on Monday night in remembrance of the day’s shooting victims. J. Scott Applewhite/Associated Press The candlelight vigil was in Washington’s Freedom Plaza. Aaron Alexis, 34, was identified by authorities as a gunman in the shooting. He died during the attack. lucas jackson/reuters Law enforcement officers stood outside the residence of Cathleen Alexis, mother of the suspected gunman, in New York. Patrick McDermott/getty images Cathy Lanier, police chief in Washington, spoke to the media as Washington Mayor Vincent Gray listened. J. Scott Applewhite/Associated Press The flag was lowered to half-staff at the US Capitol. Jonathan Ernst/reuters A woman was reunited with her husband, who was one of hundreds of workers evacuated. LM Otero/associated press Restaurant owner Oui Suthamtewakul, right, and Micheal Ritrovato spoke about working with Aaron Alexis, who was once employed by Suthamtewakul, in Fort Worth, Texas. Reuters Employees were reunited with loved ones after being evacuated from the Navy Yard. Getty Images First responders filled M Street in Washington, D.C. EPA Washington Police Chief Cathy Lanier briefed the media. JASON REED/Reuters Law enforcement officers responded to the Navy Yard in Washington, D.C., after several people were shot and killed Monday. PAUL J. RICHARDS/AFP/Getty Images A police helicopter hovered over the Navy Yard. One gunman was killed, officials said. Win McNamee/Getty Images Police snipers stood on the roof of a building at the Navy Yard complex. Alex Wong/Getty Images Emergency vehicles and law enforcement personnel responded to the shooting. JASON REED/Reuters Witnesses described a gunman opening fire from the fourth floor, aiming down on people in the first-floor cafeteria. J. Scott Applewhite/AP Police kept watch on the east plaza of the US Capitol after the shooting at the nearby Navy Yard. MANDEL NGAN/AFP/Getty Images District of Columbia Mayor Vincent Gray (right) spoke during a press conference with Police Chief Cathy Lanier. Reuters People were evacuated from the Navy Yard. Jose Luis Magana/AP Dr. Janis M. Orlowski of the Washington Hospital Center speoke about some of the shooting victims. Jacquelyn Martin/AP About 3,000 people work at the Naval Sea Systems Command headquarters, which builds, buys, and maintains the Navy’s ships. Win McNamee/Getty Images Shortly after the gunfire, workers were told to seek shelter and later to head for the gates at the complex, a witness said.