I'll be interested to see what details come out. We used them in Iraq, frequently, to kill folks that were believed to have suicide vests on and/or be in VBIEDs (i.e. they were driving a big suicide vest). In those cases, which used exactly the same robot as what the police were using here, if the individual was a known threat (i.e. the rules of engagement criteria had been met to kill them) and we didn't have granularity on whether or not they were wearing a vest or had a kill switch wired in to the vehicle, the bot would go up and place a kicker charge and fall back and then the entity would be 'rendered safe'
Is that appropriate for day to day policing? Of course not. Was this day to day policing or the dawn of an era of assassin robots? Likely not. Afterall, the robot didn't kill the guy-the EOD tech driving the robot did, no different than the aforementioned SWAT sniper bullet or an assaulting SWAT guy doing two to the chest, one to the head. Who the on-scene commander was, and what the specifics were as negotiations continued will be important to know of course-but if the guy was alleging there were IEDs and such as is what was reported, and he was the apparent shooter as also seems obvious this wasn't a quick hit-it was drawn out. At the end of which it appears to boil down to: play stupid games, you win dumb prizes.
Kudos to the Dallas PD for not putting another officer in harm's way given what we know about the situation at this time.