Jack Napier (Earth-1: Pre-Crisis)

{{Character }} {{Quote|Batman brought out all the crazies in Gotham. If it weren't for him, there wouldn't have been a Joker!|Jacob Kane|I'll Be Judge, I'll Be Jury}} Jack Napier, better known as the Joker, was a notorious criminal in Gotham City and an inmate at Arkham Asylum.
 * name=Jack Napier
 * image=Generic Placeholder 001.png
 * species=Human
 * alterego=Joker
 * aliases=
 * status=Deceased
 * occupation=Criminal {{c|formerly) Inmate at Arkham Asylum {{c|formerly)
 * affiliation=
 * relatives=
 * universe=Earth-1 (Pre-Crisis)
 * firstAppearance={{Bl|Post 27|m}}
 * lastAppearance={{Ep|A Mad Tea-Party|m}}
 * portrayal=Heath Ledger {{c|in-universe)
 * show=Batwoman

Early Life
At some point, Jack Napier became a criminal in Gotham City and an enemy of Batman who went by the alias, "Joker".

Prosecution
He was later prosecuted by assistant district attorney Angus Stanton and sent to Arkham Asylum.