I remember I saw a movie on a TV when I was a child. Approx 1999-2002.
It was a colored movie filmed looking quite modern in those years (filmed not a very long time before 1999).
What I remember from the plot: a big double-stored house, a sleeping room on the second floor. Big family. In the morning somebody from the family finds a man (presumably the owner/father) dead in his bed. And then they try to figure out who was a killer. Something suspicious was about the window in his room.
I might be mistaken, but might be that at the end of the movie they figured out that he actually killed himself.