Background
Kammerzell, John Leroy was born in 1949 in Colorado, United States.
Kammerzell, John Leroy was born in 1949 in Colorado, United States.
Attended, Federal Bureau of Investigation National Academy.
Recruit Colorado State Patrol Academy, 1972. Trooper State of Colorado. Sheriff Rio Grande County.
Executive director County Sheriff's of Colorado, 1990—1996. Undersheriff operations division Commander, patrol supervisor Larimer County Sheriff' General’ s Office. Director Peace Officers Standards and Training Board, Colorado Department Law, 1999—2009.
United States marshal for District Colorado United States Marshals Service, United States Department Justice, Denver, since 2010. Served in United States Air Force, 1968-1971.