The Devil's Ballad - (1977)

Kôsuke Kindaichi, a somewhat peculiar private detective, visits a remote town. He meets a police detective and they start to investigate an old unsolved murder. Then some murders happen. ...

Unsolved: The Murders of Tupac and the Notorious B.I.G

Signal: Long-Term Unsolved Case Investigation Team (Shigunaru: Choki Mikaiketsu Jiken Sosahan / シグナル 長期未解決事件捜査班)

Mikaiketsu no Onna 

After waking up from a month-long coma due to injuries sustained in a reckless, heated investigation, detective Yashiro Tomo quickly returns to work at the Tokyo Metropolitan Police Department. She is ordered to transfer from the First Investigative Division's Violent Crimes Unit to the Sixth Special Investigations Unit. Located in the basement, it is in charge of deciphering documents of unsolved cases. Despite Tomo's bewilderment, she begins work in her new postalong with a brusque senior detective Narumi Risa who is called the expert of document deciphering for her unusual ability to predict the personality and thoughts of a writer from writings. However, the reality is that this kind of work is nothing more than that of a "storekeeper" of investigation materials

Signal 

Kento is a policeman, who had learned the art of criminal profiling on his own. After many painful and heartbreaking past memories such as the murder incident of a young girl who he was related to during his childhood years, and his brother's suicide, he has completely lost his trust on the police. With his calm decision making ability, detailed observation skills and his expert knowledge on criminal profiling, he embarks on a new challenge as he tries to uncover the truth which lies behind his brother's death. After secretly witnessing the female murderer who had kidnapped his childhood friend 15 years ago, Kento contacted the police about this, however his information had continuously been mistreated and uncared for by the police. The case itself remains unresolved as it nears the end of its period of investigation. One day, he hears a voice from a reciever which had been disposed. The voice turns out to be of another detective who had also been investigating the same incident as ...

The Keepers 

A seven-part docuseries about the unsolved murder of a nun and the horrific secrets and pain that linger nearly five decades after her death.

Hollywood Story  - (1951)

During the 1950s Hollywood, an independent producer unwisely opens an old can of worms when he decides to make a movie about the 1929 unsolved murder of a famous silent-film director.

The Black Camel - (1931)

The unsolved murder of a Hollywood actor several years earlier and an enigmatic psychic are the keys to help Charlie solve the Honolulu stabbing death of a beautiful actress.

Night Owls - (1930)

After getting lambasted by the Police Chief for the 42 unsolved robberies committed on his watch, Officer Kennedy bamboozles vagrants Stanley and Oliver into a plan to recover his ...