The more I think about this... it' maybe because this is above and beyond just plain lying, denying involvement, creating a false alibi, etc. If it happened how they believe it did, he pre-staged a fake wreck, had a neighbor report a missing person, showed up to that bike scene continued to play along with an active investigation as if he had no idea what was going on, when he in fact staged the scene, threw away evidence of that actual crime, drove far away to remove himself and that all adds up to me to be way more than LE finding a suspect and questioning him and him denying he did anything wrong. This was a clear attempt to create a false crime to cover up for the one he actually committed.