U.S. Assistance to Mexico: State and USAID Allocated Over $700 Million to Support Criminal Justice, Border Security, and Related Efforts from Fiscal Year 2014 Through 2018, Report to Congressional Requesters [open pdf - 1MB]
From the Highlights: "For more than a decade, the activities of transnational criminal organizations have led to increased crime, violence, and lawlessness in parts of Mexico. In October 2007, Mexico and the United States created the Mérida Initiative, a bilateral partnership to address crime and violence and enhance the rule of law in Mexico. [...] GAO [Government Accountability Office] was asked to describe funding and projects the United States has provided under the Mérida Initiative. This report describes (1) State/INL [Department of State's Bureau of International Narcotics and Law Enforcement Affairs] and USAID [U.S. Agency for International Development] funding for the Mérida Initiative from fiscal year 2014 through 2018 and (2) the number and type of Mérida Initiative projects active during these years. GAO reviewed State and USAID documents and data, and interviewed officials from State, USAID, DOD, DHS, and DOJ [Department of Justice] in Washington, D.C., and Mexico City."
Government Accountability Office: https://www.gao.gov/