How could you be sure that he didnt have an explosive device on him? The police had to deal with him. Did he run into the underground after being told by police not to? YES! Would gunfire have set the explosives off? Probably, but the police did not use gunfire here, a taser gun was used. Although none of us were there, most of us have at least a slight clue as to what happened. I would love to see your answer to terrorists.
"STOP!"
"No way!"
"Please stop"
"No way!"
"Ok"