Investigators are delving into the suspect’s history after the D.C. National Guard shooting, examining possible motives, prior incidents and affiliations, CBS News has learned.
Afghan national Rahmanullah Lakanwal has pleaded not guilty in a U.S. court to charges linked to the fatal shooting of a National Guard member, court records show.
A relative says the suspected gunman in the National Guard shooting once served alongside U.S. troops in Afghanistan, raising questions about his past and possible military ties.