I think the point he was making is that private citizens are looked at more closely. The Zimmerman case is a good example, if that had been an OD officer I doubt there would have been charges. Yes there is always a public outcry, but DA's tend to cover for the people they work with.

Wrong in so many ways: 1 Zim was not a LEO, on duty or off.
2: Zim followed the guy, after receiving instructions not to.
3: in a high profile case that you know is gonna be closely scrutinized, I don't think any DA in his right mind would cover/cover up anything butt his own.
4: it might be argued that once Zim followed, he became the aggressor.
5: However he reached the point where his head was being beaten to mush on the sidewalk, at that point his life was at risk & shooting was justified. (IMO) Up to that point???
Totally different cases. The deceased pursued officers with a rifle. More chlorine for the gene pool.