USGAO, Drug Control: Better Coordination with the Department of Homeland Security and an Updated Accountability Framework Can Further Enhance DEA’s Efforts to Meet Post-9/11 Responsibilities, Report to the Co-Chairman, Caucus on International Narcotics Control, U.S. Senate, March, 2009.
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USGAO, Drug Control: Aviation Program Safety Concerns in Colombia Are Being Adressed, but State's Planning and Budgeting Process Can Be Improved, Report to the Honorable Charles F. Grassley, Chairman, Caucus on International Narcotics Control, Senate, July, 2004.
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USGAO, Drug Control: U.S. Nonmilitar Assistance to Colombia is Beginning to Show Intended Results, but Programs Are Not Readily Sustainable, Report to the Honorable Charles F. Grassley, Chairman, Caucus on International Narcotics Control, Senate, July, 2004.
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USGAO, Drug Control: Specific Performance Measures and Long-Term Costs for U.S. Programs in Colombia Have Not Been Developed, Report to Congressional Committees, June, 2003.
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USGAO, Foreign Assistance: U.S. Programs in Six Latin American Countries Have Yelded Modest Results, March 2003.
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USGAO, Drug Control: U.S. Assistance to Colombia will take Years to Produce Results (Report to Chairman and Ranking Member, Subcommittee of Criminal Justice, Drug Policy and Human Resources, Committe on Government Reform, House of Representatives), October, 2000.
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USGAO, Drug Control: Narcotics Threat From Colombia Continues to grow, Report to Congressional Requesters, June 1999.
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USGAO, Drug Control: DEA's Strategies and Operations in the 1990s, July 1999.
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