I had posted that they put their house up for sale before I realized that in the press conference he says that the body was found earlier this month, which I'm assuming meant the beginning of March however I agree with you that I thought I read somewhere it was found earlier than that. Maybe they were just planning on moving anyways and it isn't related. It does look like they are going to end up taking a loss when they sell it though they bought it for much more than it's listed at.
Also someone asked about how many bedrooms ect the home has, I suggest looking up the listing, there are pictures of all bedrooms and it's very obvious which room is Isabel's which is very sad to see.