"What is this Scanner that a Rooftop Cop had at a Protest? Seemed to be shining a green laser at certain people in the crowd."
A: "Picking out specific targets for ground police. It’s easier to track an individual through a crowd from above. This may be because they are armed, or something else that makes them high priority. Snipers are out of the question, firing into a fast moving mass of people would only end badly."
Same thought here....i realize I am old :-(