So...just how would YOU have handled it? Remember, multiple adults had already tried being nice...
Scientists Invent Working Tractor Beam
http://www.popularmechanics.com/science/a17955/scientists-invent-a-tractor-beam-made-of-sound/
The easy standard that police should use in their behavior borrows from Matthew 7:12.
In short, police should not do anything that they would arrest someone else for doing. That simple.