Last week, officials in San Francisco decided to scrap a plan that would have allowed law enforcement to use robots in situations that may require “deadly force.” Specifically, according to the language of the ordinance that the city’s board of supervisors initially approved, when “risk of loss of life to members of the public or officers is imminent and outweighs any other force option available.” The plan was rolled back after a public backlash, but the technology is out there and it may be just a matter of time before it’s used by local police departments. Marketplace’s Kimberly Adams spoke with Ryan Jenkins, a professor of philosophy and senior fellow at the Ethics + Emerging Sciences Group at California Polytechnic State University, San Luis Obispo. There’s a concern, he said, that the deployment of robots would lower barriers to the use of force, making violence a more common occurrence in police work.