The tax fraud and money laundering trial of art dealer Guy Wildenstein, 70, has been suspended in France until May 4. He is accused of hiding inheritance from his late father, Daniel, in offshore trusts and authorities seek $600 million in back taxes.

Defense lawyers for Wildenstein, who is a defendant along with two other family members and three tax lawyers, argued on Wednesday that he is "unfairly being prosecuted twice with combined criminal and administrative tax charges," reports the New York Times.

A separate court will review the case prior to May.