Gregory Sanders was a former American cowboy, musician, and superhero, operating under the name of "The Vigilante" during his years in New York. Born in Cheyenne, Wyoming, Sanders left for New York to pursue a career in music, only putting it on hold to return to Wyoming after the murder of his father to apprehend the murderers responsible. Over the years he became known as a quick shot, a popular cowboy singer, and a staple of local radio stations.
In late 1954, Sander's friend and former sidekick Daniel "Stuff" Leong was murdered by The Dummy, a diminutive crime boss for Leong's role in his arrest and imprisonment. While never convicted of the crime, it is widely believed that Sanders retaliated by murdering the members of the gang, shooting most of them, hanging The Dummy, and stomping one man to death after he survived several bullets wounds.
After this, Sanders disappeared, never being conclusively found. Reports stated that people saw him in various parts of the west in the next two decades, including his home town of Cheyenne and even New York City at one point, but after several years of no sightings, he was declared dead in absentia. Nowadays he is largely known for his suspected role in the brutal end of The Dummy Gang, as well as the adoption of his superhero name by several other mass murderers and self-declared superheroes.
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I actually had this idea in the back of my head a little bit before I saw a wikibox challenge over on SLP, which was perfect for me.
Bruce Wayne (Batman I)
Jay Garrick (Flash I)
Albrecht Krieger (Captain Nazi)
Doomsday Event (The Death of Superman)
1988 Gotham diplomatic incidents
Sandra Knight Borden (Phantom Lady)
Dudley H. Dudley ("Uncle Marvel")
Arkham Asylum
Atomic Bombing of Iraq
Justice Society of America
Steel (John Henry Irons?)
Harold "Tex" Thompson (Mr. America/Americommando)
Jong Li (Dragon Lord/Green Lantern)
Jimmy Olsen
Jack Napier (The Joker)
Dick Grayson (Robin/Batman II)
Jay Garrick (Flash I)
Albrecht Krieger (Captain Nazi)
Doomsday Event (The Death of Superman)
1988 Gotham diplomatic incidents
Sandra Knight Borden (Phantom Lady)
Dudley H. Dudley ("Uncle Marvel")
Arkham Asylum
Atomic Bombing of Iraq
Justice Society of America
Steel (John Henry Irons?)
Harold "Tex" Thompson (Mr. America/Americommando)
Jong Li (Dragon Lord/Green Lantern)
Jimmy Olsen
Jack Napier (The Joker)
Dick Grayson (Robin/Batman II)