Maybe it's because he was their swimming instructor, and gave them a ride somewhere or something? It's not like he had dozens of minors' contacts lying around and a string of lewd messages to them in his contact history (believe me, the police will have checked with the phone company by now).
Christ, panic mongers like yourself are the reason children are increasingly living in padded isolation boxes to protect them from big scary reality, and men are terrified to so much as speak to a child lest they be accused of molesting them. It's at the point now where, out of self-preservation, I would drive right by a child alone on the side of the road in the middle of winter. I would not stop to help. Why? Because if god forbid something happened to them later, or they decided to say something about me, the world would ruin my life for the greater good.
Ask yourself if that's really the best thing for children. For every pedophile you've cowed into hiding (they don't go away mind you, and when they think nobody is looking they're still going to do horrible things) you scare away hundreds or thousands of decent human beings who would help a child in need. Your child is far more likely to be hurt by tripping and falling, getting lost, or eating something dangerous; and if you're not around, you'd best hope there's a woman nearby to help because with this attitude the men will stay the fuck away.