How to find the cartel boss: Once you escape from its mansion for the first time, wait a couple days, sleep (in your house, not the rented apartment) and watch the tv news. The tv news should be about a woman (she is the cartel boss). After that, wait until evening (or at least 19:00 PM) and start raid. The boss location will show on map. Forget about the abandoned cinema mission, its a bug since she'll be on a mansion.