A Fulton County judge has disqualified defense firm Peters & Monyak from defending a medical malpractice case that sparked a mistrial in February after the firm’s possible role in the withholding of a key piece of evidence became an issue.

The mistrial on the second day of trial was initially requested by Peters & Monyak partner Jonathan Peters, but his team later reversed course and sought to remain in the case. On Friday, State Court Judge Eric Richardson ruled that the firm had an unwaivable conflict with the defendants and would need to step aside.