Caio Lomeu

I'm having the same problem, I was talking to the children during my gameplay unpretentiously and when I got to chapter 10 I decided to complete this quest, but checking all these places I believe that I already interact with them, because they are not more in these places they stay, but the quest is not complete, in the camp itself I only see about 4-5 children but I really think I've talked to all of them, or at least they are not in the places they should be.