The suspect in the deadly attack on Dallas police taunted authorities during two hours of negotiations , laughing at them, singing and at one point asking how many officers he had shot, the police chief said Sunday.
The chief and the county's most senior elected official also said Micah Johnson had larger attack plans and possessed enough explosive material to inflict far greater harm.
"We're convinced that this suspect had other plans and thought that what he was doing was righteous and believed that he was going to target law enforcement — make us pay for what he sees as law enforcement's efforts to punish people of color," Dallas Police Chief David Brown told CNN's "State of the Union."
Johnson , a black Army veteran, insisted on speaking with a black negotiator and wrote in blood on the wall of a parking garage where police cornered and later killed him, Brown said.