Wiltshire Police will take their appeal against reinstating a police officer sacked after a woman prisoner was injured at Melksham Police Station to the High Court on Friday.
Sgt Mark Andrews was jailed in September 2010 for assaulting Pamela Somerville, 60, at Melksham Police Station, and was sacked by the force.
CCTV footage showed him dragging her across the floor of the custody unit before shoving her into a cell.
His conviction was quashed after serving just six days in prison, but Wiltshire Police refused to allow him back to work, saying his behaviour was "well below the standards expected".
But in December 2011 the Independent Police Appeals Tribunal ordered the force to reinstate Sgt Andrews to his £36,000-a-year job and award him back pay.
Wiltshire Police hopes the High Court will find favour in their appeal and overturn the decision on Friday. Sgt Andrews has not been at work or been paid during the appeal.
Ms Somerville, from Colerne, was arrested for failing to provide a sample for a breath test after being found asleep in her car.
She denied any wrongdoing and the charges against her were dropped due to insufficient evidence.