IOWA CITY, Iowa (AP) — A judge says Iowa’s new “stand your ground” law is too vague in rejecting an appeal by a man convicted of manslaughter. The law says a person is immune from legal liability if they’re justified in their use of reasonable force against someone threatening them. The Iowa City Press-Citizen reports that Johnson County Judge Paul Miller ruled Tuesday that 24-year-old Lamar Wilson doesn’t qualify for immunity because evidence doesn’t show he was justified when shooting his gun.

A trial jury in February found Wilson guilty of voluntary manslaughter and other charges for a shooting in the Iowa City pedestrian mall last year that killed one and injured two others. Wilson’s lawyers filed a motion for a new trial last week, citing issues with potential witnesses and the jury selection.