Or could be part of some network that spans boroughs.  We've seen secret societies of cops exposed in LA... Wouldn't NYC be even more likely?  And Pedo ring networks? And cops under cover investigating both?  Could be any of the above getting suicided or actually killing themselves. Whatever it is all we can guess is something is about to be exposed and either the guilty are being taken out, taking themselves out or the people helping expose them are being taken out.