AP Source: gunman who murdered 5 police officers identified as Micah Johnson

Image 1 of 6

A Texas law enforcement official has told The Associated Press that a slain suspect in the attack on Dallas police was 25-year-old Micah Johnson.

The official spoke on the condition of anonymity because he said he was not authorized to release the information. There were no immediate details on the suspect's middle name or hometown.

The attack began Thursday night during a protest about the recent killings by police of black men in Louisiana and Minnesota. Five officers were killed and seven others were wounded. Two civilians were also wounded.

Police Chief David Brown said Friday that his department used a robot-delivered bomb to kill a suspect after hours of negotiations failed. He says the suspect expressed anger over recent killings by police of black men in Louisiana and Minnesota.

Dallas' police chief says a suspect in the deadly overnight attack on police officers told negotiators that he acted alone and was unaffiliated with any group.

Chief David Brown said at a news conference Friday that the suspect also said he was upset about recent police shootings and wanted to kill white people, particularly white officers.

He says officers killed the suspect with a robot-delivered bomb after hours of negotiations failed.

Although Brown says the suspect said he acted alone, it remains unclear if that was the case. He said earlier Friday that three other suspects were in custody, but he later declined to discuss those detentions and said police still didn't know if investigators had accounted for all participants in the attack.

The attack began Thursday night during a protest about the recent killings by police of black men in Louisiana and Minnesota. Five officers were killed and seven others were wounded. Two civilians were also wounded.

A robotics expert says Dallas police appear to be the first law enforcement agency to use a robot to kill.

Peter W. Singer, of the New America Foundation, says the killing of a suspect in Thursday night's fatal shooting of five police officers is the first instance of which he's aware of a robot being used lethally by police.

Dallas Police Chief David Brown told reporters that after hours of failed negotiations and in order to not put any officers in harm's way, his department used a robot to deliver a bomb that killed the suspect. Brown said they saw no other option.

Singer said in an email Friday that when he was researching his 2009 book "Wired for War" a U.S. soldier told him troops in Iraq sometimes used MARCbot surveillance robots against insurgents.

Associated Press writer Will Weissert contributed to this report.