Is it even remotely possible that the "couple" WAS BG - and someone else (an accomplice), who had been waiting down at the site the entire time?
It could fit the witness report... (and could also help explain how TWO girls were overpowered and killed - without anyone hearing anything - something that definitely bothers me)
Not sure if they've ruled out the possibility that another person was involved...
MOO person with a handgun can easily order two people to follow orders. MOO