Where Are Her Organs? - Organs? What organs?

That was one fucked up episode.

That's not true

The main reason cited seems to be ratings, budget issues, and also possibly 9/11; meanwhile, the relevant murder (their was only one, he was not a serial killer) happened in 2005, with the trial in 2006, way after Invader Zim was actually cancelled. Here's an article from January 21st of 2002 reporting on the cancellation.