The ruling of a three-judge panel of the Supreme Court may be appealed with a five-judge panel.
The court said Voicu’s time in custody from March 30, 2010 until July 18, 2011 will be taken off his five-year sentence.
Voicu was indicted for influence peddling and forgery alongside former judge Florin Costiniu and businessmen Costel Casuneanu and Marius Locic.
The Supreme Court has also sentenced Locic to four years in prison for influence peddling and gave suspended three and four year-prison sentences, respectively, to Costiniu and Casuneanu.
According to anticorruption prosecutors, Voicu had offered to help influential people who had certain interests in files tried by the Bucharest Court and the Supreme Court, in return for support in acceding to government positions.
Romanian media has made public fragments of discussions which show Voicu had tried to intervene with the Supreme Court and the Police in cases involving Casuneanu, Locic and other officials.