Medicolegal Death Investigation Principles, Jurisdiction, and the Role of the Investigator
Authority comes from statute, not from the job title
Two systems dominate U.S. practice. A coroner is typically an elected county official - sometimes a physician, often not, and in some jurisdictions the sheriff or a layperson holds the office. A medical examiner is an appointed physician, usually a forensic pathologist, heading an office staffed by professional investigators. Many states run hybrid systems. A candidate must know which model governs their jurisdiction, because the investigator's legal authority, reporting duties, and record-release rules all flow from that statute.
Jurisdiction has two dimensions
Subject-matter jurisdiction describes which deaths are reportable: violent, suspicious, unexpected, unattended by a physician, or occurring in custody or at work. Geographic jurisdiction is usually fixed by where the body is found or where death was pronounced - not where the fatal injury occurred. A decedent injured in County A who dies in County B is generally County B's case.
What the investigator does - and does not do
The investigator represents the office at the scene: confirming jurisdiction, documenting, preserving evidence, identifying the decedent, notifying next of kin, and producing records. The investigator does not determine cause and manner (the pathologist does), cannot arrest or conduct searches, cannot displace law enforcement control of a crime scene, and generally cannot authorize release of a body to a funeral home outside office protocol.
Trap: questions that assume a coroner must be a physician, or that an investigator may take custody of evidence that belongs to law enforcement. Rule of thumb: if you cannot cite the statute or written office policy that grants the authority, you do not have it.