MARK STEVEN TONKIN
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Officer Rank: Deputy Sheriff
Memorial Panel: 47-E: 14
Department: Orange County, California, S.D.
End of Watch: October 24, 1988
Cause: HELI
Age: 31
Years of Service: 7
Description: Deputy Tonkin was killed in a helicopter crash during a joint drug interdiction mission. The helicopter snagged on a power line and exploded into a hillside in western Imperial County. Also killed in this incident were Deputy Roy A. Chester, Sergeant Richard G. Romero, Deputy James McSweeney, Investigator Michael David Davis and three National Guardsmen.
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