Police DNA testing discarded drug bags to catch Police are now running DNA tests on disused drug bags. POLICE are DNA testing discarded bags with drugs to catch those behind the deadly trade as they ramp up efforts to clean up late night venues. Concerned about the rising number of overdoes, police are also raiding nightclub toilets to catch users and drug traffickers. A police drug operation surrounding King St in Melbourne's CBD netted 160 people between March and October. Police are also alarmed that during the same time, officers attended 32 overdoses - and that's just between Collins St and Flinders Lane. It can be revealed that several nightclubs are being investigated for alleged breaches of licence conditions and some face have operating hours cut back and even temporary shutdowns. Sergeant Glen Finlay told the Herald Sun drugs were the biggest issue facing the King Street precinct and GHB was the primary concern. But ecstasy, acid, MDMA and ice are also frequently being consumed - in nightclub toilets, multi-level carparks, alley ways, dark corners in licenced venues and even on dancefloors. "Our main focus is drugs and that is centred on King St given the huge amount of overdoses which we haven't seen anywhere else in all the areas and premises we enforce," he said. Sgt Finlay said inside a venue's toilet, it was not uncommon to find four people in a cubicle, deal bags littered inside, powder residue on toilet seats and basins and people talking about "measuring up." "There are a number of venues that every time a police officer would go in, it's highly unlikely they won't come out without someone in possession of drugs," he said. Sgt Finlay said police were seizing discarded bags of drugs on streets or in nightclubs after people dumped them in a bid to avoid police. If we find a reasonable quantity of drugs which has been dumped we may look at DNA tests and spot test. It gives us a line of inquiry or avenue of investigation," he said. Sgt Finlay said there were cases where offenders were identified following DNA tests with many simply saying "you got me" after it was produced. But Sgt Finlay said police were also facing a battle with some owners and security attempting to hide the problem. He said some premises had set up alert systems and alarms to notify staff when police arrived. Sgt Finlay said there were cases where a person overdosed in a venue and staff turfed the patron out through a side door and into a laneway without calling for help. "To us that is reprehensible that they would not make a phone call to an ambulance," he said.