(a) When an inquisition is being held, if the coroner or the jury shall deem it requisite, he may summon one (1) or more physicians or surgeons, to make an autopsy or postmortem examination.
(b) If it is necessary to obtain or preserve evidence of the cause of death, the district attorney may order that a qualified physician perform an autopsy or postmortem examination of the body of any person who appears to have died by unlawful means, by violence, or when the cause of death is unknown.
(c) No person is subject to civil liability solely because he requested or was involved in the performing of an autopsy that was ordered by a coroner or district attorney.