It may be just me, but your advice sound suspiciously similar to what one is supposed to do if, on a nature hike, you see a predatory animal crossing your path.
And don't forget that the talk about being a police officer as being particularly dangerous is not true.
http://thefreethoughtproject.com/cop-top-10-dangerous-jobs-country-tanks/
http://fee.org/blog/detail/by-the-numbers-how-dangerous-is-it-to-be-a-cop