Using civil forfeiture laws, police can confiscate property, like cash and vehicles, from motorists if they suspect the property is tied to illegal activity. The police don't actually have to prove such a connection exists, and motorists must often fight lengthy and expensive legal battles to retrieve their property.

With the Justice Department taking in a record $4.2 billion in forfeitures for 2012, civil forfeiture has become big business. And business is the operative word here because behind many questionable law enforcement practices—and transportation policies for that matter—you find public officials partnering with private business interests focused primarily on the profit motive. Think Redflex and ATS for red-light cameras, Vigilant Solutions for automated license plate readers and any number of international conglomerates for toll roads.

For civil forfeiture, that business partner appears to be a company called Desert Snow, which trains police officers on the finer points of civil forfeiture. Desert Snow has also created a database known as Black Asphalt, which police around the country use to enhance their forfeiture operations.

Black Asphalt lets its 25,000 users compile and share detailed data on private motorists—whether they've done anything wrong or not—including addresses, social security numbers, information from traffic stops or interrogations, searches, etc. Information is shared informally without official oversight, and many of the reports end up in federal fusion centers where they can be shared with law enforcement agencies at all levels.

Desert Snow encourages users to provide data about their traffic stops by offering rewards and incentives. The more data an officer enters, the more rewards he earns. Desert Snow also holds an annual competition to recognize officers who have seized the most contraband. Top earners (to borrow a term from The Sopranos) are honored at Desert Snow's annual conference.