From the sounds of it he's patrolling to help lost children and such get home, the batman costume is because Batman is a recognized and trusted symbol. Good to see that used for good, because it could be used for evil so easily.

Honestly though, if you wanna see how to turn a violent city around Brazil, look to Medellin in Columbia, their transformation over the last two decades has been nothing short of miraculous, due to a renewed focus on education, public equality, and public works and transportation.