Movies like My Dear Killer

Following a mysterious decapitation (via mechanical digger) of an insurance investigator, Police Inspector Peretti is put onto the case. Slowly more people are found dead - a man supposedly commits suicide, a women is strangled, another attacked in her flat - but all the clues lead to an unsolved case of kidnapping and murder. Can Peretti find the murderer if his major clue is a little girl's drawing?