The state's chief investigator at the time told ProPublica a severe staffing shortage prohibits the medical examiner's office from autopsying possible suicides or alleged murder-suicides and often people aged 40 and older who die of unexplained causes.
That practice could lead to murderers walking free and important public health data going unreported, the organization reported.
In its 2007 analysis, Oklahoma ranked in the bottom five of the nation's busiest medical examiner's offices in terms of the rate of autopsies performed.
Dr. Eric Pfeifer, chief medical examiner, said his office simply does not have the staff to do more than it already does.
Five forensic pathologists were tasked with examining 22,000 cases in 2012 alone, Pfeifer told The Oklahoman last week. It was one of several reasons the office lost its accreditation in 2009.
“We're not even doing autopsies on cases we probably ought to be doing autopsies on,” he said. “We simply don't have the staff or the space to run that many cases through so we can't achieve the performance standards. We're really kind of at the max.”
Pfeifer said the addition of five new pathologists this year should help increase the number of autopsies performed.