A Contra Costa County sheriff's deputy told two colleagues he was making "dirty DUI" arrests on behalf of a private investigator who was setting up men to damage their reputations in legal fights, an investigator said in court documents.
Deputy Stephen Tanabe, 47, told a reserve sheriff's deputy on patrol with him the night of Jan. 14 that a drunken-driving arrest the two were making outside a Danville bar was a "setup" and that the target needed to be "dirtied" for a future court date, a sheriff's investigator wrote in a search warrant affidavit.
Tanabe was working with a private investigator who had been hired by the target's wife for $5,000, the affidavit said. The deputy is suspected of receiving "financial benefits" for the arrest, the document said.
Tanabe, an Alamo resident, was arrested Friday night on suspicion of drug and weapons crimes but has not been charged. He is free on $260,000 bail.
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