Kohring was indicted on federal bribery and extortion charges on May 4, 2007. He, along with former state legislators, Republicans
Pete Kott and
Bruce Weyhrauch, were accused of soliciting and accepting bribes from
VECO Corporation, an
oil field services company. Their capital and district offices had been among 20 searched by
FBI agents on August 31, 2006. Kohring resigned his seat on June 20, 2007. On November 1, 2007, a federal jury found Kohring guilty in three out of four criminal charges and acquitted on the fourth, a charge of extortion. In May 2008, he was sentenced to three and a half years in prison. Kohring asked outgoing President
George W. Bush for a pardon that was not granted. The conviction was vacated, and in 2011, Kohring agreed to plead guilty in exchange for being sentenced to time served and conditions on his release. Kohring was released on June 11, 2009. ==Death==