Special Agent Michael Garbo of the Drug Enforcement Administration (DEA) was killed on October 4, 2021, during a routine sweep of an Amtrak train station in Tucson, Arizona. Two other law enforcement officers (LEO) were wounded.

The number of law enforcement professionals nationwide who died in the line of duty in 2020 increased 96% over the previous year, according to the National Law Enforcement Officers Memorial Fund, a nonprofit group that has long tracked officer fatalities.