An inquest is a legal inquiry into the cause and circumstances of unnatural deaths. There are four main types: police inquests conducted by police, magistrate inquests led by magistrates, coroner's inquests (no longer used in India), and medical examiner systems which rely on forensic pathologists. In India, only police and magistrate inquests are used - police inquests are preliminary investigations while magistrate inquests handle more serious cases like those involving custody. The goal is to determine the cause of death through investigations, autopsies, and witness testimony.