From the Dallas Chief of Police:
“We saw no other option but to use our bomb robot and place a DEVICE on its extension for it to DETONATE where the suspect was. Other options would have exposed our officers to great danger,” Brown said. “He seemed lucid during negotiations.”
So, yes they used an explosive device of some kind to disable ( kill ) this perpetrator.
This is the future of warfare, those robots are hardened to blast shrapnel and gunfire. no need to risk more lives, wheel in the robot and detonate an antipersonal device kills the bad guy yhe robot soldiers on. Good job Dallas you saved the taxpayers I. your city millions in legal bullsh1t the liberals would have fostered on us should this guy been taken alive.