Dr. Cyril Wecht is a world-renowned forensic pathologist who has consulted on some of the most famous murder cases.
Investigators have sought Dr. Wecht's expert opinion in some of the nation’s most high-profile deaths, from Elvis Presley to JonBenét Ramsey.
Wecht says he has written more than 50 books during his career as a forensic pathologist, testified in close to a thousand trials and performed more than 20 thousand autopsies, including that of Dr. John Yelenic. Dr. Wecht spoke to Dateline NBC about the case and wrote about it in his book, Final Exams: True Crime Cases. Read an excerpt below.