First time I have heard of a robot being used as an explosive device to kill a suspect...
Officers opened negotiations for surrender but Johnson said he would speak to black police officers only. He also said that he acted alone and was not part of any group. According to Chief Brown, Johnson appeared delusional during his standoff, "We had negotiated with him for about two hours, and he just basically lied to us, playing games, laughing at us, singing, asking how many did he get and that he wanted to kill some more." By about 2:30 a.m., Chief Brown saw no possibility of negotiating further and made the decision to use a bomb disposal remote control vehicle armed with about 1 pound (0.45 kilograms) of C-4 explosive. The plan was to move the robot to a point against a wall facing Johnson and then detonate the explosives. Johnson saw the robot approaching and fired repeatedly at it in an attempt to stop it. However, the robot exploded as intended, killing Johnson immediately. The robot, while sustaining damage to its extended arm, was still functional.
Just When I Thought I Was Out, They Pull Me Back In!