They( bootleggers and their distributors) are part of a close knit community. Sometimes, when police come to check on a tip they have already put the bootleg alcohol away. They know who their customers are when they come. It's much like a clandestine narcotics network, in the past, bootleg alcohol was found to be a mixture of alcohol and energy drinks. Some are a mix of pure alcohol, carbonated drinks and an ingredient used in anti-mosquito repellent.