New York Ripper murders

[1] Despite numerous suspects being arrested in connection to the crimes, all were eventually cleared, and the murders remain unsolved.

Ten minutes later, as she was walking back up the stairs to her apartment building, she was choked unconscious, stabbed multiple times with a keen-edged knife, and mutilated.

[4] Investigators examining the crime scene noticed that Cohn had clutched a clump of gray hair in her left hand before her death.

As police searched the apartment building, they discovered blood droplets on two steps of another staircase, on the opposite side of the tenement, but they were unable to determine if this was related to the case.

[5] Additionally fingerprints were found on Cohn's face and throat as well as the pail of milk she was carrying.

[6] Investigators also found a piece of lemon drop candy on her body that had been wet, meaning she had been eating it.

[7] 20 detectives were assigned to work on the case, and the police kept close watch on the neighborhood in the days following the murder.

[8] On May 3, 1915, four-year-old Charles Murray was strangled, stabbed to death, mutilated, and disemboweled beneath a dimly-lit staircase in his family's 270 First Avenue tenement.

As the girl played outside of a bakery – waiting for her aunt – she was approached by a well-dressed man with a mustache and black derby hat.

On April 29, 27-year-old Edward Richman was arrested in connection to the letters, but soon cleared of actual involvement in the murder.

I am the fellow that wrote you the letters, and as I said before a man that keeps his ears open and mouth shut will always get along and never get caught.

Locals frequently chased, beat, and threatened to lynch people they thought were the perpetrator.

The man had to be rescued by a police officer, who kept him safe in a drugstore until a patrol car arrived.

Rumors soon spread that a "ripper" was in custody, causing 1,000 outraged locals to gather outside of the police station.