Why couldn't the police, who you pay taxes to, do their jobs? Apparently a sophisticated robbery ring was operating with a well understood MO in a predictable location and the police couldn't figure out how to use those facts to effect an arrest?
Instead of "protecting" one neighborhood by installing privately owned surveillance devices, seems like the police could have just sat there, waited for a BMW full of Tren de Araugua gangsters to show up and arrest them.
In what world is this the reasonable course of action that was arrived at with the police.
The world of practical realties that the police can't be everywhere at once?
Funny how Tren de Araugua is behind everything nowadays, they're like the commies in the 1950s.
Nothing about OP's story sounds plausible or reasonable. The criminal gangs are magically afraid of flock cameras but not any other kind of surveillance? They had footage of the crooks but it took too long to evaluate it, and yet the cops knew exactly which gang was doing it?