May have been a TV movie?? Mid- late 1970s. I was very young but I know I watched it at least twice. It seems like a boy was missing. There's a scene towards the end that shows his body laying at the bottom of a well. I think a younger sibling (brother?) looks down the well and there was a glimpse of the missing boy laying crumpled at the bottom. Haunted me for years but I never knew what the movie was!