Well........he would have had all night to clean up and dispose of the body, since I think he was up all night anyway. Then he could have started calling around in the morning, claiming he slept through the night and didn't realize she didn't come home until he awoke.But Brad couldn't do that if he was guilty. He needed the extra time to clean. When Jessica called in the morning, he couldn't say "she didn't come home last night" because then she would have called police immediately. He would have had to give an excuse to bide more time. Although, the one thing that doesn't make sense is why he would have answered the phone at all.