Are there any other things about the case that doesn't seem right to you?I think he is underground, living in a subway station with a group of homeless people that know nothing of the news reports; just thinking that they are taking in another lost soul into their group.
#1) NYC is densely populated, so no one saw him in the streets a little after he ran out of the building? Children walk the streets by themselves all the time in NYC without harm, so what is the coincidence that a kidnapper just so happens to be there to take him after he randomly left school? If he was kidnapped, the person who did it knew Avonte and Avonte knew him. I think he probably saw someone he knew outside through the window, ran to them and that person took him. If he's alive, which I pray that he is, I don't think he's in NYC anymore. His disappearance wasn't random, it was planned.