Former private investigator Christopher Butler, of Concord, who was a key figure in a Contra Costa County law enforcement scandal, is expected to testify in federal court in San Francisco today in the trial of former sheriff's Deputy Stephen Tanabe.
men arrested in the so-called "dirty DUI" stings were husbands or
ex-husbands of Butler's female clients, who were involved in divorce
or child custody proceedings and were looking to gain an advantage in
Butler is expected to take the stand
today in the court of U.S. District Judge Charles Breyer at the Federal
Building on Golden Gate Avenue.