WASHINGTON (Sputnik) — Twenty-five-year-old Johnson was a US Army reservist deployed to Afghanistan from November 2013 to July 2014.
Johnson received the Afghanistan Campaign Medal, National Defense Service Medal and Global War on Terrorism Service Medal, among other awards, the report noted.
Earlier in the day, Dallas Police Chief David Brown said the suspect in the deadly police attack been killed by a bomb planted by the law enforcement after negotiations had broken down.
US President Barack Obama said earlier in the day the deadly attack on police had been calculated, and pledged all those involved in the shooting would be held accountable.
Obama said the US Federal Bureau of Investigation (FBI) was in touch with the Dallas police over the attack.