Why did someone murder The Black Dahlia Elizabeth Short?

The killer, whether he was aware of it or not, left clues to his personality from the condition of the body and how it was dumped. It is very possible the man was a sadist. Short endured horrible things before her killer finally got tire of her and fianlly killed her. Most serial killers are excited by having power over others, and the Dahlia's probably was too. There is still so much of the unknown when talking about serial killers.