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Dallas ambush gunman identified

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Police cars sit on Main Street in Dallas following the sniper shooting during a protest on July 7, 2016. A fourth police officer was killed and two suspected snipers were in custody after a protest late Thursday against police brutality in Dallas, authorities said. One suspect had turned himself in and another who was in a shootout with SWAT officers was also in custody, the Dallas Police Department tweeted. / AFP / Laura Buckman (Photo credit should read LAURA BUCKMAN/AFP/Getty Images)

Update: Micah Xavier Johnson, identified by law enforcement officials as the dead gunman in the Dallas ambush, had served in the U.S. Army Reserve, two U.S. officials said.

Update: A neighbor said there are police cars outside the Texas home of Micah Xavier Johnson, whom law enforcement officials have identified as the dead gunman in the Dallas ambush. Wayne Bynoe, the neighbor, told CNN that Johnson lived with his mother and “keeps to himself.”

Breaking: The dead gunman in the Dallas ambush that left five officers dead has been identified as 25-year-old Micah Xavier Johnson of Mesquite, Texas, law enforcement sources familiar with the investigation told CNN.

Johnson had no criminal record or known terror ties, a law enforcement official said.