Use of police robot to kill Dallas shooting suspect believed to be first in US history

Police's lethal use of bomb-disposal robot in Thursday's ambush worries legal experts who say it creates gray area in use of deadly force by law enforcement

For what experts are calling the first time in history, US police have used a robot in a show of lethal force. Early Friday morning, Dallas police used a bomb-disposal robot with an explosive device on its manipulator arm to kill a suspect after five police officers were murdered and seven others wounded.

"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," Dallas police chief David Brown told reporters.