What's the name of the movie where the kid gets kidnapped?

A really long time ago I watched a movie about a little boy getting kidnapped. He was taken from a mall and several years later he was found as a teen. He was living in same neighborhood as his real family the whole time. I believe the kids name was David and then the kidnappers changed it to something. I'm thinking Sam but could be wrong. Can anyone tell me the name of this movie??