Longtime Medical Examiner Dr. Nizam Peerwani found his top deputy, Dr. Marc Kraus, made 59 mistakes in death investigations last year. Kraus was barred from performing autopsies in murder cases in November and left the office just last week.
"From our perspective and I'm speaking collectively as the defense bar, it's really unprecedented,” Varghese said.
Defense attorneys say the revelations potentially raise questions about the prosecution of murder cases – past and present.
"Everyone is beyond shocked that this could have happened and now it's going to be raised in every case where the Tarrant County Medical Examiner has touched the file,” Varghese said.