Experts: Use of robot to kill suspect opens door for others

FILE - In this Thursday, July 7, 2016 file photo, Dallas police respond after shots were fired during a protest over recent fatal shootings by police in Louisiana and Minnesota, in Dallas. Police in Dallas were the first in the nation to use a robot to deliver and detonate a bomb to kill a suspect, but other law enforcement agencies are willing and able to follow suit, including some that even have trained for the day when they'd have to do so. The killing of Micah Johnson using a robot-delivered bomb ended a night of terror in which he shot 14 officers, killing five of them, and also wounded two civilians.