W. James Heller grew up rich. As a child, he was acquainted with (one wouldn't really call them friends) Floyd Lawton aka Deadshot. An only child, he grew up as a spoiled loner. One day, his family took a wrong turn and ended up in the middle of a race riot. His parents were both killed by blacks. Heller went to live with his grandfather, who had supported the nazis during WW2. Under his grandfather, the boy went from conservative to flat out racist. When his grandfather died, he left all of his wealth to Billy, who used it to fund several neo-nazi and white supremist groups. He later founded his own white supremist group called the Aryan Empire.
To further his goals, he adopted the name William Hell and became a masked vigilante. He would turn over black, latino or asian criminals to the police while sending white ones to the nearest Aryan Empire headquarters. Black Orchid did surveillance on the man and the Suicide Squad was sent to bring him down.
Deadshot posed as William Hell at an Ayran Empire meeting. Taking the podium, Deadshot gave a speech to both the Aryan Empire members and the black protesters that they were letting their hate get in the way of what really matters and that if one group can be oppressed, the other surely could as well. Heller showed up in costume, declaring himself to be the real William Hell. To determine who the real one was, they both took turns trying to shoot an apple off Captain Boomerang's head. Deadshot hit his mark, but the squad used Chronos' time machine to change the course of Heller's shot, causing it to miss. Deadshot then unmasked Heller, ruining his reputation.
Later, Heller would show up sporting a suit of power armor and going by the name White Dragon. He fought and was defeated by Hawkman before joining the Fourth Reich in an attempt to wipe out the descendants of the original Justice Society. Again, he was defeated by Hawkman.
White Dragon next showed up on the Suicide Squad. From the beginning, he rebelled against Waller, going so far as to try to kill her during a training exercise. White Dragon sided with the General when he attempted to overthrow Waller and kill the rest of the Squad. As the two groups engage, Twister uses her illusion powers to disable Heller. Meanwhile, the General is fighting Multiplex and a thrown duploid lands on Twister, breaking her concentration. This gives White Dragon the opening he needs and he incinerates Twister. Seeing her friend murdered she becomes appalled, Plastique attacks Heller viciously. She breaks a hole in his mask by throwing explosives toward him. She gets close to his eyes and uses her power to create an explosion inside Heller's armor, killing him instantly.
There was another man who called himself The White Dragon. Daniel William Ducannon was a neo-nazi with an armored suit. He battled Hawkman once.