Eugene O'Donnell : In George Zimmerman 's trial , his attorney responds with a bad joke . O'Donnell : Trying to humor in a trial is fraught with risk of appearing too casual . He says the defense must counter the appearance of callous indifference . O'Donnell : The more self - assured he sounds , the less trustworthy he is .
Eugene O'Donnell : In George Zimmerman 's trial , his attorney began with a bad joke . O'Donnell : Resorting to humor in a trial is fraught with risk of appearing too casual . He says the defense must counter the appearance of callous indifference . O'Donnell : The more self-serving Zimmerman sounds , the less trustworthy he appears .