In a rare decision setting aside a unanimous jury verdict in an insurance liability case, a Delaware Superior Court judge found defense counsel’s reference to documents the court had ruled inadmissible misled the jury.

According to the opinion it’s the only jury verdict Judge Mary M. Johnston has overturned in two decades on the bench, and it’s one of 11 times in the past 10 years a Delaware Superior Court judge has granted a new trial in any type of case.