We simply don't have all the facts, however, the most suspicious element is his being tied and placed in the closet after his death. The staged appearance of the scene. Drawers opened but not rifled through etc. Bag of stuff dropped in the garage. His handgun was found in the very closet his body was found. The chair propped to appear to be locked in, pillow sham in the closet, the silly way she was found "tied" up. The "I must have had a seizure" and I heard nothing statements from her are pretty questionable.
I think they got the right person.
Apart from the murder, the handgun, the sex toys, and the joining his family for Christmas dinner, even bringing eggnog are kind of strange from a JW standpoint.