A Philly DA named Barry said that since the officer only had some facial bruising, it was obvious he wasn't really threatened, and he should have gone inside and called 911.
I don't know this particular case, but that is a fundamentally flawed analysis of how one assesses reasonable fear of loss of life or limb. Must we also wait to be shot before returning fire? Ridiculous.
If anything, the facial bruising combined with the disparity of force (multiple attackers) is corroborative to reasonable fear. Where must one attend law school to get a job in Philly?