How do you know what opportunities were available to the "intruder" out of interest?
Well, first of all, let me make it clear that I do not believe an intruder ( of any description ) got into the McCanns' apartment, murdered a child and then took her dead body away with him
It just doesn't make sense
But let's assume, for the sake of debate, that is what happened
You ask what opportunity I think an intruder would have in those unlikely circumstances of disposing of the body he has inexplicably taken with him
He would surely have
TRANSPORT! ... a murderer would be unlikely to take a body
unless he had transport, wouldn't you agree ?
Afterall, if this intruder
had no transport then there really wouldn't be much point in taking the body in the first place ... only to have it discovered buried practically on the doorstep
So there is the 'opportunity ... because transport means distance ... and any disposal of the body would be as far as way as possible from the scene of the crime and imminent search
That's why I don't think the digging in Praia de Luz has anything to with an intruder