I remember, on at least one occasion as a kid, seeing parts of a movie on TV which totally freaked me out. I mainly remember seeing a boy walking around on the roof of a house while talking backwards; kind of like the weird Twin Peaks effect where they rewind the voices. There were police or other adults that thought the boy was important and wanted to catch him, but he was wandering into hard to get places.
I think I saw it on TV a second time, which freaked me out again, and that’s when I learned he was the witness to some murder. Possibly of his parents. It may have even shown flashbacks to the murder (which I believe was in their bedroom). I think they were trying to get clues out of the boy and that’s why they were chasing him around. Although it’s probably good to get any child off the roof as a general rule.
I have no idea why he was talking backwards or why he was on the roof, but it was very unsettling to me. I thought for sure this would be an easy one to google with all the details I remembered, but none of the movies that came up sounded like the right one, or even mention a backwards talking boy.