Consider the old casino trick: One person takes out a lot of money, "loses" it at poker to someone else, that person cashes out. How can you possibly trace tha

Consider the old casino trick: One person takes out a lot of money, "loses" it at poker to someone else, that person cashes out. How can you possibly trace that? Sift through the casino's financials for deposits and withdrawals of a similar size? Sometimes the trail goes completely cold.