"Diversity of Citizenship." Robber apparently last lived in Kansas. Bellagio = MGM Resorts International, with Las Vegas corporate address. Hence Federal Court (esp. for a large amount of money robbed). I've also heard that removing any item from a casino without permission can be treated as a Federal offense. (Unless perhaps a Nevadan robs a Nevada-based casino. But Nevadans are too nice to even think about such dastardly tricks.) Take note, swizzlestick collectors! Always ask permission before walking out with chips. Especially those $10,000 ones.