Healey, an interim circuit judge, said he has never come across a case with similar circumstances in 150 trials.
“I’ve never had a hung jury,” Healey said at Monday’s hearing.
A mistrial was declared on the murder charge after jurors deliberated for four days. The 12 jurors found him guilty of three counts of attempted second-degree murder and a count of firing into an occupied car.
Dunn was charged with fatally shooting Davis, of Marietta, Ga., in 2012 after the argument over loud music coming from the SUV occupied by Davis and three friends. The teens were black. Dunn, who is white, had described the music to his fiancee as “thug music.”