The committee investigating Churchill determined he could not be punished for his essay, which compared the victims of the Sept. 11, 2001, terrorist attacks to a Nazi official. But the committee is investigating charges that he copied other people's work.

The embattled ethnic studies professor has only a matter of hours to respond to allegations that he copied or misrepresented other authors' works, and that he may have misrepresented his American Indian heritage.

Churchill has denied any wrongdoing.

The panel determined previously that the First Amendment protects his essay, but he could lose his job if investigators find evidence of plagiarism.

Previous Stories:

• May 4, 2005: Longmont Completes Inquiry Into City Employee With Churchill Ties
• March 30, 2005: Faculty Reviews Churchill By First Examining Themselves
• March 24, 2005: CU: Churchill's Essay Protected But Alleged Plagiarism Needs Further Review
• March 23, 2005: Regents Meet To Discuss Churchill, Hoffman Replacement
• March 14, 2005: Most CU Regents Oppose Any Buyout For Churchill
• March 11, 2005: Churchill Buyout Stalled?
• March 8, 2005: CU: Review Of Churchill Expected To Take Longer
• March 4, 2005: CU President: 'Dangerous Times' For Academic Freedom
• March 1, 2005: Churchill: Artwork Issue Utterly Contrived
• February 26, 2005: Report: CU May Offer Churchill Early Retirement
• February 10, 2005: Churchill Speech At Wisconsin University Given Green Light
• February 9, 2005: Churchill: I'm Not Backing Up One Inch
• February 8, 2005: CU Professor's Speech Goes On, As Scheduled
• February 8, 2005: Controversial CU Professor's Boulder Speech Canceled
• February 5, 2005: CU Professor Refuses To Apologize For 9/11 Essay
• February 3, 2005: Protesters Arrested As CU Regents Meet About Professor
• February 1, 2005: CU Prof's Appearance In New York Canceled
• February 1, 2005: Gov. Owens Letter Calls For Churchill To Step Down
• February 1, 2005: Controversial CU Prof Resigns As Department Chair
• January 28, 2005: School Won't Cancel CU Prof's Controversial Appearance
• January 28, 2005: CU Distances Itself From Prof.'s Controversial 9/11 Remarks
• January 27, 2005: CU Professor Who Suggested 9/11 Attacks Were Justified Stirs Protest