Edward Herman

Dr. Edward Herman, a former Professor of Business, helped try to cover up the killing fields of Cambodia along with Noam Chomsky in several writings, including a book called After the Cataclysm.
Source: http://www.thedailybeast.com/articles/2016/09/05/how-both-sides-got-cambodia-wrong.html 
https://www.amazon.com/After-Cataclysm-Political-Economy-Rights/dp/1608463974