Lawyers for Sholom Rubashkin, the Iowa businessman sentenced to 27 years in prison for bank fraud, are calling for a new trial based on the presiding judge’s interaction with federal investigators in the law enforcement raid targeting Rubashkin and his family-owned kosher meatpacking plant.

Rubashkin’s lawyers, who filed a motion for a new trial Thursday in the U.S. District Court for the Northern District of Iowa, said Chief Judge Linda Reade should have recused from presiding over the Rubashkin case based on her interaction with the investigation team.