The Valentine’s Day Massacre is an unsolved multiple murder that resulted from the gangland culture of the prohibition era. 7 members of the North Side Irish gang were lined up against a wall and executed in a Warehouse in Chicago. The people who perpetrated the crime - who were most likely acting under the directions of notorious gangster Al Capone - have never been identified. What is known is that there were four killers, two were dressed as police officers, and they were seen exiting the warehouse following the shooting.
In spite of the fact that there had never been any convictions, the FBI had a number of leads over the years. During the interrogation of a relatively unknown criminal Byron Bolton, he admitted to playing a part in the murders and named accomplices that included a well known hitman that he worked with. However these statements were never acted upon. Two other Cosa Nostra hitmen have also been suspects during the investigation, but again this didn’t result in any conviction.