Homicide

Dallas suspect taunted police during 2 hours of negotiation

  • This undated photo posted on Facebook on April 30, 2016, shows Micah Johnson, who was a suspect in the sniper slayings of five law enforcement officers in Dallas Thursday night, July 7, 2016, during a protest over two recent fatal police shootings of black men. An Army veteran, Johnson tried to take refuge in a parking garage and exchanged gunfire with police, who later killed him with a robot-delivered bomb, Dallas Police Chief David Brown said. (Facebook via AP)

    This undated photo posted on Facebook on April 30, 2016, shows Micah Johnson, who was a suspect in the sniper slayings of five law enforcement officers in Dallas Thursday night, July 7, 2016, during a protest over two recent fatal police shootings of black men. An Army veteran, Johnson tried to take refuge in a parking garage and exchanged gunfire with police, who later killed him with a robot-delivered bomb, Dallas Police Chief David Brown said. (Facebook via AP)  (The Associated Press)

  • An FBI evidence response team works the crime scene, Sunday, July 10, 2016, where five Dallas police officers were killed Thursday, in Dallas. A peaceful protest over the recent videotaped shootings of black men by police turned violent Thursday night as gunman Micah Johnson shot at officers, killing five and injuring seven, as well as two civilians. (AP Photo/Gerald Herbert)

    An FBI evidence response team works the crime scene, Sunday, July 10, 2016, where five Dallas police officers were killed Thursday, in Dallas. A peaceful protest over the recent videotaped shootings of black men by police turned violent Thursday night as gunman Micah Johnson shot at officers, killing five and injuring seven, as well as two civilians. (AP Photo/Gerald Herbert)  (The Associated Press)

  • An FBI evidence response team works the crime scene, Sunday, July 10, 2016, where five Dallas police officers were killed Thursday, in Dallas. A peaceful protest over the recent videotaped shootings of black men by police turned violent Thursday night as gunman Micah Johnson shot at officers, killing five and injuring seven, as well as two civilians. (AP Photo/Gerald Herbert)

    An FBI evidence response team works the crime scene, Sunday, July 10, 2016, where five Dallas police officers were killed Thursday, in Dallas. A peaceful protest over the recent videotaped shootings of black men by police turned violent Thursday night as gunman Micah Johnson shot at officers, killing five and injuring seven, as well as two civilians. (AP Photo/Gerald Herbert)  (The Associated Press)

The Dallas police chief says the suspect in the deadly attack on officers taunted authorities during two hours of negotiations, laughing at them and at one point asking how many officers he had shot.

The chief and the county's most senior elected official also said Sunday that Micah Johnson had larger attack plans and possessed enough explosive material to inflict far greater harm.

Dallas Police Chief David Brown says Johnson, a black Army veteran, insisted on speaking with a black negotiator. The chief says he also wrote in blood on the wall of a parking garage where police cornered and later killed him.

The shootings marked the deadliest day for U.S. law enforcement since the Sept. 11, 2001, terrorist attacks. Five officers were fatally shot just a few blocks from where President John F. Kennedy was slain in 1963.