In lieu of the “coroner’s register,” the coroner may keep an official file for each deceased person containing all of the information required by Section 27463. At any time after the completion of the coroner’s investigation, and the closing of the particular case involved, the coroner may photograph or microphotograph the contents of the file in accordance with the provisions of Section 26205, and, when the photographs or microphotographs are placed in conveniently accessible files and provision is made for preserving, examining, and using the same, the original file may be destroyed.