The tricky thing with “suspicion” is what does that mean in law. The police could arrest anyone on the suspicion of anything. In this case they would have told magistrate that witnesses had identified him as a flasher and that one of these offences took place yards from the home of a woman who is now missing and that they believe he was in the area on the night and at the time she went missing and wish to continue to question him. The magistrate would think that’s entirely reasonable as I do and I believe most people would.No way would they have been able to hold him for over 90 hours unless they had some evidence to put to him on the charges he was arrested for (abduction).
A magistrate extended the time they could keep him in custody on Saturday night by 24 hours still on the abduction charges.
They must have had suspicion of abduction to arrest him on those charges in the first place.