I can't even believe people are asking these questions. It's pretty obvious that he kidnapped the younger boy & so I believe he kidnapped the older boy when he was small too. My guess is at first, when the 1st boy's picture was all over the news, that this creep held him as a prisoner & did not take him out. He probably drugged him too, to keep him submissive to him. 11 years old is really young - after enough time had passed - his brainwashing was complete & he could reward him for "good behaviour".
I am convinced he kidnapped this 2nd child as a replacement for the 1st - who was getting too old to "excite" him anymore. I am also convinced that he likely would have murdered the older boy before too long. I don't think it's a stretch that other boys may have met this fate with him before.
I hope the whole story comes out - we can learn alot about how these monsters blend in our society & how they get away with these heinous crimes.
This boy is blameless & an innocent victim.
I think back to age 11 and thought I would have called home and/or tried to escape, but I don't know, since it's still my adult mind trying to think as I did at age 11.