Australian casino giant Crown Resorts sees shares fall after reports Asian crime syndicate used it to launder cash
https://www.scmp.com/business/companies/article/3020514/australian-casino-giant-crown-resorts-sees-shares-fall-after
To launder money, crime syndicates want to use agencies where money is exchanged with something. If its procedure is not clear, these agencies would be better place for concealing flow of money.
So, the time when all of the casinos have to reveal money flow will come.