More Information and Media Coverage:
- Associated Press, Murder Conviction In Drummond Union Leader Slaying. February 6, 2013.
- Colombia Reports, Drummond paid to kill unionists: Ex-paramilitary. March 14, 2012.
- Los Angeles Times, Murder in Colombia and a U.S. multinational. October 1, 2009.
- Forbes, COLOMBIA: Drummond Union: Govt Muffles Key Witness. July 24, 2007.
- Los Angeles Times, U.S. accused of bending rules on Colombian terror. July 22, 2007.