Joker's Henchmen were three henchmen working for the Joker during Batman's supposed death at the hands of Sidney Debris. One was named "Murphy" and the other two are unnamed.
History[]
The three thugs worked for the Joker during the time Batman was seemingly killed by Sidney Debris. When Joker wanted to make sure he was dead by committing a robbing spree, Murphy asked a stupid question. Angry, Joker pushed him in front of Bud and Lou. After he was patched up, Murphy learned to keep his mouth shut.
The thugs joined their boss along with Harley Quinn and Sidney in their robbing spree at a jewellery store, but after learning that Batman isn't coming, Joker blamed Sidney for seemingly killing The Dark Knight, and he and his gang escaped and took Sidney to the Ace Chemicals plant.
The three thugs watched Joker give his eulogy (which is a speech for Sid during the ambush). Before finishing his speech, Joker blames Sid for all the damage he has caused him by killing Batman. Joker tells his henchmen to put Sidney in the coffin and locks him inside, and the coffin is sent on a conveyor belt towards a vat of acid (which is part of the ambush). When the coffin is completely drowned in acid, Joker seems to overcome the sadness and is ready for having some food.
What became of Murphy and the other two henchmen was unknown.