We all wonder how it could be done by an outsider,who was reportedly very drunk, while the MAN of the house was supposedly HOME, while the dog was there, and without leaving a shred of evidence of his having been there.
OTOH, there was plenty of evidence that other strangers had been in the house, but the police chose to ignore that evidence. There were prints, hairs, etc. from non family members that police did not attempt to identify.
By the time serious change of stories by the VD's were brought forth, it was just too late to call the show off, I think.
sw