Simple, what other reason would he have for spending half an hour breaking into multiple rooms inside the church? That’s what a burglar would do. The only explanation I have heard, is that he was trying to cover up the murder. But I don’t think that theory holds any water. Breaking down all those doors unnecessarily just to cover up a murder? Thats a crazy amount of unnecessary work. A hit man does not bring burglary tools with him to a murder.
If all he wanted to do is kill her, he had no reason to even go inside the church, let along break down every door and window inside the building. He could have just waited outside, and shot her in the head when she got out of her car, and then left. If he really wanted to cover it up, he could have taken her purse and made it look like a robbery. He would have never even been on video. But instead he goes inside and puts on a big show for the cameras for half and hour breaking doors and windows. I’m sorry, but that’s totally not believable. That's not something any person would do, while they were getting ready to kill someone.