Next airing Wed May 2, noon ET

Cash and Corruption

In the Rio Grande Valley, money has become something of a drug ' corrupting people's lives and luring them into believing in its broken promises. Officers at the Brownsville Port of Entry are performing a 'blitz' enforcement operation ' random searches for contraband ' to deter the onslaught of smugglers. In nearby Laredo, Lucky and the narcotics unit hunt down desperate heroin dealers who are selling hits of black tar in school zones for $20.