Roger W Byard1,2,3, John D Gilbert4,5, Neil E I Langlois4,5. 1. School of Medicine, The University of Adelaide, Frome Rd, Adelaide, SA, 5005, Australia. roger.byard@sa.gov.au. 2. Forensic Science, 21 Divett Place, Adelaide, SA, Australia. roger.byard@sa.gov.au. 3. Discipline of Anatomy and Pathology, The University of Adelaide, Level 3 Medical School North Building, Frome Road, Adelaide, SA, 5005, Australia. roger.byard@sa.gov.au. 4. School of Medicine, The University of Adelaide, Frome Rd, Adelaide, SA, 5005, Australia. 5. Forensic Science, 21 Divett Place, Adelaide, SA, Australia.