Good question Ashley. I just think if it was the husband authorities would know by now. It shouldn't take long before DNA confirms who the blood belongs to. If it belongs to the husband and suspect it will. Then maybe we can rule him out. We had a case where a married couple was killed and dumped in a rural area. A baby who belonged to the married couple was left in the home unharmed for several days. It turns out the husband who was having financial difficulties did some drug dealing with the wrong people and burned them on some money.
Most of the time if the husband not involved (domestic violence) then love or money is the motive.