Not surprisingly, Las Vegas is a “money laundering paradise.” There have been multiple high-profile drug busts with accompanying money laundering charges. The Las Vegas Review Journal profiles an IRS agent who helped the DEA make some of the busts.
Of course money laundering is something Las Vegas has much experience with (oh gosh, I know the casinos are just totally squeaky clean now and all that skimming is a relic of their colorful past and only the terminally suspicious would note that construction has long been known as a way to make money do magic tricks.)