[Oztrich Boy]

The thing that struck me was that the cop was trying to help the child even though he himself had suffered serious injuries

Evidence? AFAICT the cop's identidy, what action he took, and any injury he received is hidden behind the Blue Wall.

[smoothsailing]

“As the officer attempted to provide aid to the girl,...”

http://www.theblaze.com/stories/2012/08/14/off-duty-cop-hits-4-year-old-girl-with-motorcycle-then-shoots-and-kills-angry-dad/