What the Peeper Saw (1972)

Name: What the Peeper Saw
Genre: Horror, Drama, Thriller
Released: 1972-10-14
Duration: 89 min
Cast: Mark Lester, Britt Ekland, Hardy Krüger, Lilli Palmer, Harry Andrews

What he saw is what he did.

A wealthy author's second wife begins to suspect that her 12-year old stepson may have murdered his mother, who mysteriously died in a bathtub accident.