Late arrival

Where is he! CofU usually gets home from his after-school programme 5.30-5.40 and now it' s 6.15! Do I go out looking for him, do I call the homestay co-ordinator, or the police? No, CofU turns up at 6.20, breezes in surprised that I've been concerned about his whereabouts. He says he's been to a friend's house (but they didn't go inside), he doesn't know where, just up a mountain! I gave him a piece of my mind. Spelled our my expectations, he is much too young to be roaming the streets.