A new" robocop" which can identify social distancing in crowds and warn people to move apart has been developed by scientists. The surveillance robot could help reduce the spread of the virus and also aid contact tracing, researchers from the University of Maryland said. They explained how the mobile bot can detect people in crowds who are not observing social distancing rules, using its own camera and sensor. The robot can even tap into an existing CCTV system, if available, to detect breaches