Exactly. If they can have a robot with a bomb, then they can have a robot with tear gas + flashbang.

This is the Dallas police department, they have equipment capable of dealing with this situation -- to include armored cars and ballistic shields.

I hope the legal process is explored in this case.

They had one of those super armored trucks (Bearcat) there on location. It even has a little turret on top designed for safely shooting out of. They can withstand multiple .50 rounds to the same location. What's the point of spending millions in purchasing and maintenance on these if you're not going to use them?