"He was secreted behind a brick corner and the only way to get a sniper shot to end his trying to kill us would be to expose officers to grave danger," Brown said. "The other option was to continue to negotiate. We had negotiated with him for about two hours, and he just basically lied to us, playing games, laughing at us, singing and asking how many did he get and that he wanted to kill some more and that there were bombs there.
"There was no progress on the negotiations," he added. "I started to feel that it was in only a split second he would charge us and he would take out many more before we could kill him." Brown said he told his officers to "use your creativeness" to come up with a plan.
They came back to him with a plan to use the robot to set off a bomb that would kill Johnson.
"The plan was to improvise our robot with a device to detonate behind the corner and within a few feet of him to take him out," the chief said.
Johnson was killed at the scene. The investigation into the attack is ongoing.
The use of a bomb robot to kill a suspect has revived the debate over the militarization of the police, which has led to some police departments acquiring armored vehicles and trained their officers in "coordinated heavy weapons training."
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