This is a fascinating story: Police Raid Mexico City Neighborhood. It is all about vigilante justice.

Mexico is, as I think I've said before, chock full of corrupt public officials, especially local and state cops in poorer areas (our town's cops had a relatively good reputation, but other towns didn't have that). The article sort of leaves one with the impression that these folks just sort of lost it, but I can totally imagine that this is the culmination of a long struggle for justice for these folks. It's a shame all the way around.

By the way, there is an excellent old Peter Lorre movie called "M" that plays out similarly to this. Set in a German slum back in the 1920s. Check it out.