I'm curious if the police had to quickly improvise to attach the bomb to the robot and rig up a way to detonate it remotely, or if they already had all that figured out in advance with the parts and equipment, having planned in advance for the possible need to kill someone this way.
It's probably the first time in the US that a bomb was used by law enforcement to kill someone. If this will become a common way to kill suspects, then it's not a good legal precedent.
My concern should not be construed as defending the party that did these shootings and killed & wounded so many police. I of course don't condone that at all. Quite the opposite.