There are possible brothels in some apartments in a condominium in Cheras, KL. My instinct can tell from their slutty looks/dresses/the men (customers) who accompanies with them in the apartment corridor or lift. The prostitutes must be from China, judging from their language.
Pls check if they consume drugs. You can observe if they urinate along corridors and car park darkly lit areas. Send it for narco test. If confirm place a report. Pls report all vehicle plates leaving and entering condos - especially the suspect patrons. Gv police as much info, and pictures too. It has worked for me when tip off cops.