Her murder is witnessed by her neighbor, an English pianist, who attempts to solve the murder with the help of a reporter, but finds himself thwarted time and time again by a grisly set of murders -- making him wonder how the murderer always seems to be one step ahead.
This film has a character named Carlo. He's got a small but pivotal part in the movie. He's a drunk and ashamed of his sexuality but a sympathetic character who's rather sweet in his own way.
A remake of this film, by George A. Romero, is on its way in 2011.