What does Dallas's 'bomb robot' mean for the future of policing?

Havoc broke out at a peaceful protest against police violence and racism in Dallas on Thursday evening when a sniper opened fire, shooting 12 officers and 2 civilians. Police cornered the suspect, now known to be Micah Johnson, in a downtown parking garage around 11 p.m. As negotiators tried to talk him out of the parking deck over a series of hours, news came out that five of the officers had died. Negotiations broke down; gunfire was exchanged between police and Mr. Johnson. Then, around 3 a.m., police reported that the sniper was dead.