Three days after the Dallas police sniper attack I have not yet encountered any thoughtful discussion of the recent Dallas sniper robot murder.

The suspect (though undoubtedly guilty of mass murder) was trapped in a garage and surrounded by what were likely dozens of Dallas police. All very personally angry and vengeful.

We are told (indirectly by murky police "sources") that after negotiations "failed" the suspect was given an ultimatum: surrender or be killed.

I wonder what the legal rationale for that demand actually is?

"Surrender or die!"

This suspect wasn't going anywhere. Had he made some attempt at escape or a suicidal charge, he would have been cut down by dozens of police rifle and pistol bullets. The Dallas police are a professional organization and as such, should not have been in any danger from further attack or even a suicidal charge by the suspect trapped in a parking garage.

Why not simply wait him out? He needed food, water and sleep. Those requirements mean that surrender or suicide would be inevitable.

Why not use CS or tear gas? I'm sure the Dallas police had plenty of that available. This suspect had no protection from that.

Yes, the police were hot, tired, angry and vengeful (especially that). But those circumstances don't preclude non-lethal efforts at capture.

As it stands the only motives we have are what the Dallas PD says they were, via conversations with the suspect. Were these recorded? Why have we not heard the details by now? Surely there were lots of recorded radio chatter and perhaps even cell phone texting/calls. Did the Dallas police legitimately want a peaceful outcome? Did someone higher up the order this suspect's death to keep him from talking about his motives or possible accomplices?

While this suspect would have inevitably been killed by the State (in Texas, killing law enforcement guarantees you the needle), why wasn't he captured and given a trial? Summary execution of suspects isn't legal, is it?