A flamboyant Staten Island lawyer who made headlines by challenging another attorney to “trial by combat” and who was recently indicted on kidnapping and other charges for allegedly taking part in a violent scrap metal fraud ring remains behind bars and a May trial date has been set in his case.

Richard Luthmann, 38, who in 2015 unsuccessfully moved that he and the opposing counsel in a dispute between two investment firms settle their differences in physical battle, was arrested on Dec. 15, 2017, along with two other defendants on an 11-count indictment that included fraud, extortion, wire fraud conspiracy and money laundering charges.