"Drug offenses were the most prevalent type of criminal offenses investigated using reported wiretaps. Table 3 indicates that 39 percent of all applications for intercepts (1,266 wiretap applications) in 2019 cited narcotics as the most serious offense under investigation. Applications citing narcotics combined with applications citing other offenses, which include other offenses related to drugs, accounted for 76 percent of all reported wiretap applications in 2019, an increase of 8 percent from 2018. Conspiracy, the second-most frequently cited crime, was specified in 13 percent of applications. Homicide and assault, the third-largest category, was specified as the most serious offense in approximately 4 percent of applications. Many applications for court orders revealed that multiple criminal offenses were under investigation, but Table 3 includes only the most serious criminal offense listed on an application."


Administrative Office of the United States Courts, 2019 Wiretap Report (Washington, DC: December 2019).