Ward Churchill, a tenured professor of ethnic studies, has denied the allegations and threatened a lawsuit if he is dismissed.
CU President Hank Brown made the recommendation in a 10-page letter sent to the chair of the committee that handles tenure issues. University spokeswoman Michele McKinney confirmed published reports about the recommendation Monday but said the school would not make the letter public.
The university's governing Board of Regents would have the final say on whether Churchill is fired or disciplined. It could be several weeks before the case ends up in its hands; the tenure panel must review it first.
Churchill touched off a firestorm with an essay likening some victims in the World Trade Center to Adolf Eichmann, who helped carry out the Holocaust.
University officials concluded he could not be fired for his comments because they were protected by the First Amendment, but they launched an investigation into allegations that he fabricated or falsified his research and plagiarized.
The interim chancellor of the university's Boulder campus and another faculty committee have also recommended Churchill be fired. At Churchill's request, the Privilege and Tenure Committee also reviewed the case and recommended a one-year suspension without pay and a demotion.
Churchill said Monday the university process was biased against him and that he believes he will get a fairer hearing in the courts.
"I've got more faith in almost anything (than in the university process)," he said. "A random group of homeless people under a bridge would be far more intellectually sound and principled than anything I've encountered at the university so far."