This is the only question I can't seem to find any connection in the film. We know that Bobby escaped from Holly Jones (the actual kidnapper) after only 3 weeks in captivity. Bobby have since been traumatized and experienced memory loss (due to the kidnapper's drugs and the event itself) and was obsessed with snakes, mazes and children's clothes as he tried to reenact the kidnapping to remember what he forgot.

We also know that it was Holly who kidnapped Anna and Joy, so their clothes should be found in Holly's house instead of Bobby's house am I right?