(3) Notwithstanding subdivision (2) of this subsection, in any case in which the district attorney of the county asserts to the Chief Medical Examiner or the medical examiner of the county in which the body was located that there is probable cause to believe that a violation of G.S. 14-18.4 has occurred, a complete autopsy shall be performed. The district attorney has at least 72 weekday hours after pronouncement of death by a person authorized under this Part to express the opinion that death has occurred to make the assertion required by this subdivision, provided that the district attorney or the investigating law enforcement agency provides notification within the first 24 hours after the pronouncement that such an assertion might be made. The district attorney may, but is not required to, assert to the Chief Medical Examiner the facts supporting probable cause to believe that a violation of G.S. 14-18.4 has occurred. A complete autopsy report of findings and interpretations, prepared on forms designated for the purpose, shall be submitted promptly to the Chief Medical Examiner. Subject to the limitations of G.S. 130A-389.1 relating to photographs and video or audio recordings of an autopsy, a copy of the report shall be furnished to any person upon request.