Removal from GTA III
Rockstar did not reveal for several years why Darkel was removed from the game. It was speculated that he was removed due to the 9/11 attacks. Despite being taken out, Darkel remains listed in the GTA III manual credits and the character texture remains in the game's data files.
A group of tramps with molotovs can be found in the tunnel that connects 8-Ball's bomb shop in Harwood to the rear of the Supa Save! in Portland View, supposedly remnants of Darkel's "gang" - a Liberty Tree article also alludes to a rise in tramp-related assaults. Darkel was supposedly meant to live underneath the Callahan Bridge, where he would give the player missions.
In a Q&A, Rockstar claimed that Darkel was removed because he did not totally fit with the rest of the game. In this Q&A Rockstar denied that Darkel was removed due to 9/11, and denied the rumor that one of his missions was going to be blowing up a bus full of school children. 
Rockstar confirmed that Darkel would have appeared in five missions, but only the following can be confirmed:
- I Scream, You Scream (Boss; Replaced by El Burro in the final version of the game)
- Love Hurts (probaly replaced by the mission Love's Dissepearence)
- School Is Out
- ↑ http://www.rockstargames.com/newswire/article/19861/grand-theft-auto-iii-your-questions-answered-part-one-claude-dar.html