US authorities are closing in on cartel cash. If drug lords want their narco cheddar cleaned and moved into the banking system, they have to get it to Mexico. Working to stem the tide, the cops tail cars suspected of smuggling millions.

An oil fracking boom and subsequent bust have brought extortion, prostitution, drug dealing and theft to the remote prairie town of Williston, North Dakota.

From card cheats, to armed robbers, to 'trick' rollers, criminals across America make a beeline for the casinos of Las Vegas.