Jonathan Crane was a university professor who was obsessed with rare books, and decided to become a criminal, running rackets so that he could steal the money he needed to buy more books. He decided to use fear as his choice weapon and for this purpose, he took on the identity of the Scarecrow. His activities brought about the attention of Batman and Robin, who through their keen detective skills learned the Scarecrows' true identity and easily apprehended him.
