Real Name: Joseph Kerr
Occupation: Criminal
Marital Status: Single
Base of Operations: Gotham
Height: N/A
Weight: N/A
Eyes: N/A
Hair: N/A
First Appearance: N/A
Created By: Bob Kane

The man later known as the Joker was a master criminal going by the alias of the Red Hood. His name was Joseph Kerr, an engineer in electronics. (his costume consisted of a large domed red helmet and a red cape.) While attempting to rob a chemical plant, his men were dispatched and then he was suddenly surrounded on a catwalk by Batman and Robin. Left with no alternatives, he dove into a catch basin for the chemicals and swam to freedom, surviving because of a special breathing apparatus built into the helmet. The toxins in the vat permanently and grotesquely disfigured him, however, turning his hair green, his skin white and his lips red. Upon discovering this, he went insane and became the Joker.