He (German suspect) would of course with pinpoint accuracy know when to half inch Madeleine,yeah right.
Brueckner entered the American woman's villa. He carried his 'rape kit' with him including a video camera which he set up to record the outrage.
I would say he did that using pinpoint accuracy to half an inch on that occasion. Why on earth do you suppose he would have been unable to target the McCann apartment ... as well as the other apartments where intelligence or observation told him children would be unattended.
He used his skill for pinpoint accuracy to pinpoint the American woman's villa where he carried out a premeditated outrage.
Why do you think he would have been incapable of using his pinpoint accuracy displayed in the choice of rape victim, to enter any one of four apartments he knew would be vacant?
Risky perhaps ... but as a prolific burglar he would be used to taking a few risks but not so many that he wouldn't assess the risk beforehand.