An inquest is a judicial inquiry in common law jurisdictions, particularly one held to determine the cause of a person's death. Conducted by a judge, jury, or government official, an inquest may or may not require an autopsy carried out by a coroner or medical examiner.nquest can also mean such a jury and the result of such an investigation. In general usage, inquest is also used to mean any investigation or inquiry. An inquest uses witnesses, but suspects are not permitted to defend themselves.