R. Kelly is set to go to trial in April 2021 and his lawyers are trying last ditch efforts to ensure his freedom.

Kelly’s lawyers claim prosecutors are refusing to turn over evidence. A motion filed by his attorney, Michael Leonard, in the U.S. District Court in Brooklyn stated, “The only reason that these materials are being withheld is to allow the government to gain a tactical advantage and as gamesmanship.”

The motion is asking for the prosecutor to turn over all evidence. It’s not clear what type of evidence is allegedly being withheld.

U.S. District Judge Ann Donnelly has a pre-trial conference scheduled for Feb. 17, which is when it will be decided if evidence is being withheld. The New York trial begins April 7.

The 53-year-old stands accused of several sex crime charges, including child pornography, racketeering, and sex trafficking, across New York, Minnesota and Chicago. He has pleaded not guilty to all charges.