Sobriety checkpoints in California are increasingly turning into profitable operations for local police departments that are far more likely to seize cars from unlicensed motorists than catch drunken drivers.

An investigation by the Investigative Reporting Program at UC Berkeley with California Watch has found that impounds at checkpoints in 2009 generated an estimated $40 million in towing fees and police fines – revenue that cities divide with towing firms.

Additionally, police officers received about $30 million in overtime pay for the DUI crackdowns, funded by the California Office of Traffic Safety.

In dozens of interviews over the past three months, law enforcement officials and tow truck operators say that vehicles are predominantly taken from minority motorists – often illegal immigrants.

In the course of its examination, the Investigative Reporting Program reviewed hundreds of pages of city financial records and police reports, and analyzed data documenting the results from every checkpoint that received state funding during the past two years. Among the findings:

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