A Yellow Parrot in a Field of Lilacs

Directed by Umberto Umberti

A frightened young woman is attacked and left for dead in an old, dark house. An American student is unsatisfied with the official explanation of the murder. He discovers that the woman was really a monster; he decides to try to help the real killer escape from the police.

From the "Do-it-yourself Giallo Kit", courtesy of my brother, Lee.