Freddie Gray’s relatives arrived for the trial in the afternoon, after the prep-school kids had left. By their dress, they seemed to have just gotten off work in the medical and clerical fields. The family did not appear at ease in the courtroom. They winced and dropped their heads as William Porter and his fellow officer Zachary Novak testified to opening the doors of their police van last April and finding Freddie paralyzed, unresponsive, with mucus pooling at his mouth and nose. Four women and one man mournfully listened as the officers described needing to get gloves before they…