Henry Lee, who was often quoted with Ms Nancy Grace, was a doctor that made huge statements about blood spatter and crime scene analysis. CSI TV's medical examiner seems to only attend death scenes. I came across an article about the medical examiner that was dismissed in Calgary because he was a fraud ... another scenario of failure to check credentials.
Gotta love a scandal ... recent history in the Medical Examiner's Office in Calgary (the problem has since been corrected):
"The family of a Calgary toddler whose death was deemed a homicide by a since discredited pathologist is suing the province over its handling of the case.
In a statement of claim filed Wednesday seeking damages approaching $2 million, the family states it was torn apart by the false allegations.
...
Belenky was not qualified, licensed, formally accredited, or registered to practice as a forensic pathologist in the province of Alberta, claims the lawsuit, filed by Calgary lawyer Doug Perras.
The boy died on April 4, 2009.
In his certificate of medical examiner filed on July 20, 2010, Belenky stated that the immediate cause of death to the deceased infant was blunt head injuries, and that the manner of death was homicide, the claim says.
In his post-mortem report, Belenky detailed an array of injuries, which a review of the autopsy found didnt exist, it says."
http://www.calgarysun.com/2012/02/29/family-files-2m-suit-over-botched-autopsy-of-toddler
In terms of checking credentials and requesting proof of degrees, it looks like Calgary has a particularly bad record.