From the Document: "Federal law enforcement agencies reported 65 arrest-related deaths and 614 deaths in custody in fiscal year (FY) 2020 (figure 1). From FY 2016 to FY 2019, federal agencies reported an average of 53 arrest-related deaths and 449 deaths in custody each year. There were more deaths in custody in FY 2020 than in any year since FY 2016. The manner of these deaths included homicide, suicide, illness, accident, and other or unknown means."
NCJ 304939; National Criminal Justice 304939
U.S. Department of Justice, Office of Justice Programs, Bureau of Justice Statistics: https://bjs.ojp.gov/