Silent Fall?

There is a movie that I suddenly remembered seeing when I was younger. It had this autistic boy who only spoke by repeating things that other people said and I remember he was climbing on the roof and people were trying to get him down. Then I remembered that he also witnessed some type of murder and the police or somebody was trying to get information out of him. I did some "research" and I think the movie is called "Silent Fall" (which would mean that it isn't a sequel to "Silent Spring"), but I don't know. It's nostalgia just because I remember seeing it when I was really little and I kind of want to see it just to see how well I rememered it. Has anybody seen this movie?