According to Julie Wiedemann, of the American Board of Medicolegal Death Investigators, there are currently more than 3,100 death investigation jurisdictions scattered throughout the United States.
Two kinds of systems deal with investigation of deaths, particularly sudden deaths, in the United States. While some sheriff-coroner system, others use appointed medical examiners (usually forensic pathologists) to investigate deaths. Still other states use a mix of both systems.
Cullen W. Ellingburgh, Supervising Deputy, Orange Co. Sheriff-Coroner told POLICE, "In California, the majority of the counties combine the office of sheriff and coroner and with few exceptions patrol deputies perform the coroner functions."
Rick McAnally, assistant deputy chief coroner of the Orange County Coroner, explained that even though coroners are elected, they still have medical and law enforcement expertise available to them. "In smaller areas, maybe still the local mortician is coroner but this is changing. In California, this is a thing of the past. Almost all are sheriff-coroners now."
Accordingly, in jurisdictions using the sheriff-coroner system, sworn, armed deputy coroners carry out investigative duties. Said McAnally, a former paramedic, "A lot of cases we deal with involve crime-just by the nature of the position." He said that deputies sometimes do apply arrest powers, though that's not their primary duty.