As a key government witness wrapped up his testimony Monday in the criminal case over Dewey & LeBoeuf’s collapse, defense lawyers urged a New York judge to throw out indictments against two former firm executives, arguing that prosecutors had hamstrung their efforts to defend their clients in court.

After a 2015 mistrial, prosecutors are once again trying to persuade a Manhattan jury that former Dewey executive director Stephen DiCarmine and former firm CFO Joel Sanders fraudulently misled investors and lenders about Dewey’s finances before it was forced into bankruptcy five years ago.