For the purposes of this part, an inquiry by a county coroner is an informal examination of a death and its attendant circumstances to determine whether:
(1) an inquest, which is a formal inquiry, should be held;
(2) the reporting physician should certify the death;
(3) any further action or examination should be made concerning a death; or
(4) there is anything unusual or remarkable about a death that may warrant further action by the county attorney or the law enforcement agency that has jurisdiction.