What is Axeman of New Orleans case?

This is an unsolved case of a serial killer who was active in New Orleans, Lousiana from May 1918 until October 1919. There were 4 dead victims and 8 injured victims of the attacked. The victims were attacked with an axe which belongs to the victims themselves. The killer usually smashed the back door of a home and then attacked the victims with an axe or straight razor. This case cannot be classified as a robbery case as the killer did not take any valuables from the victim house. There were a few theories regarding this case. Man believed that the crimes were racially motivated because most of the victims were Italian-American. Some said that there was a mafia involvement but there was not much evidence to link with this case. Some also said that the killer only kills woman but if there was a man trying to prevent the killer's action, the killer will only kill the man. There was case where the woman in the house was killed but not the man. Another theory was that the killer committed those murders in order to promote Jazz music.  

Houses that been attacked by the Axeman 

13 March 1919, there was a letter from the killer that was published in the newspaper said that he would do his act of crime again at 12.15am  but would spare anyone's lives who played Jazz band. Therefore, on the night of March 13, all of the dance halls in New Orleans was filled with people and jazz band. Professional and amateur Jazz bands played at hundreds of houses in the town of New Orleans. Thus, there was no murder that night. The axeman was never caught or identified as his act of crimes mysteriously stopped just like how it had started.

A letter from the Axeman that was published in the newspaper 

An article from the newspaper about the Axeman