"What could Kelsey have bought at the grocery store that might have fueled his temper?" Maybe it wasn't a question of "what". NOne possibility may have been that a someone was at her home that morning. Someone whom she baked cinnamon rolls for and later, drove her to the market. She didn't want to leave the baby in the car with that someone, so she brought the kid inside. Her mother expressed surprise that she hadn't done her hair and make up. Maybe she was in a hurry to get back home before the father of her kid arrived. And he arrived early, just in time to see that someone drive away. Do we know if she drove her own car to the store?