I agree with the poster who said the time of day is a red herring - Bridger could just as easily done this at midday. He was looking for the opportunity. It could have been any other child, given the opportunity. He lured April because she KNEW him, he was not a dangerous stranger, he was "just" X's dad - adults who have known him years had no inkling that he could be secretly like this, so how could a 5yo know. I am sure he told her some lie about going off to see her friend, or that her parents had said it was OK, he would have been smiling and charming, not at all scary - and she trusted him. Had he come and asked her parents if he could go treat her and his DD to an ice cream, or take them out somewhere, maybe they would have said yes - they thought they knew him, lots of people thought they knew him. This is what worries me most - men like this are hidden in plain view. Every village or estate has them. every school has parents like this. we don't know where they are.
I remember years ago seeing a program where the production team were adamant that their kids knew not to go off with anyone. They had this drilled into them and were then left to playing a park with film crew watching - parent sat close by reading the paper - bloke comes along with a dog lead and asks the child to help look for his lost puppy and the child goes, straight away, no persuasion needed - the parents were gobsmacked, thinking their child knew not to go off.
I for one have been working through some "scenarios" with my DC - and hopefully all are old enough to understand that not going off with ANYONE without telling me, includes friends of the family who they have previously had lifts from, and aunts and uncles etc etc.
RIP April, and peace & healing to your family