The Bloodstained Butterfly (1971)

A forensic psychologist must determine if a minor should be charged with murder.

An unidentified fifteen year-old girl is found hanged after an anonymous tip-off. The girl, Silvia Polvesi, is soon discovered to have been murdered. A peeping tom is caught with photos of her having sex with a teenage drop-out but he is later released due to lack of evidence. The investigation, conducted by Inspector Silvestri and the assistant public prosecutor Vittoria Stori, focuses on the girl's parents. Conspiracies and horrors pile up, as do the body parts.

A private investigator is forced into a dangerous alliance with a killer in order to uncover a quiet town’s grisly criminal underbelly and clear the name of her mentor, who is implicated in the crimes.

Two veteran New York City detectives work to identify the possible connection between a recent murder and a case they believe they solved years ago; is there a serial killer on the loose, and did they perhaps put the wrong person behind bars?

Inside the halls of an elite arts academy, a timid music student begins to outshine her more accomplished and outgoing twin sister when she discovers a mysterious notebook belonging to a recently deceased classmate.

Coming from a police family, Tom Hardy ends up fighting his uncle after the murder of his father. Tom believes the killer is another cop, and goes on the record with his allegations. Demoted to water-way duty Tom, along with new partner Jo Christman, navigate the three rivers looking for clues and discovering bodies. This time the victims are women Tom knows, he must find the killer to prove his innocence.

A homicide detective teams up with a criminal profiler to catch a serial killer whose crimes are inspired by the children's game, Hangman.

When a kidnapping victim turns up alive after fifteen years, a profiler and a private investigator try to piece together the mystery.

An elderly and retired police detective and a young amateur sleuth team up to find a serial killer whom has resumed a killing spree in Turin, Italy after a 17-year hiatus.

As a police officer investigates the gruesome murder of her colleague, she discovers that a mysterious supernatural force is behind it.