Stone said Apperson "retaliated" against Zimmerman during their encounter in May because of this earlier dispute. To discredit Apperson's testimony that he felt in fear of his life when he saw Zimmerman flash a gun first, Stone relied on two pieces of evidence: Zimmerman's window was rolled up when the shot was fired and his windows were too darkly tinted for anyone to see inside. Police officers and crime scene analysts verified that information during the trial.