Because it’ll go a long way to the killer getting off with a nutso defense if the whole family is crazy. Could be Cruz’ attorney is playing this. 12 hours on a Saturday isn’t going to hurt the younger brother other than take him away from his video games. It might actually help him stay away from FB.
But, yes, in any other situation this would be the wrong move.
What video games had Zachary been playing? Where did he go to school? I haven’t heard anything about him other than this.