"The International Criminal Police Organization (ICPO)- INTERPOL is the world's largest international police organization, whose purpose is to enable cooperation on crime fighting and prevention matters worldwide. In 1938, Congress authorized the United States to be an INTERPOL member (22 U.S.C. 263a). The United States is the largest contributor to INTERPOL's regular budget. In addition to funding, Congress has long maintained interest in several aspects of INTERPOL's activities, including its governance and membership, the scope of its policing authorities, and the potential exploitation of its notice system through which members share critical information."
CRS In Focus, IF10766
Congressional Research Service: https://crsreports.congress.gov/