Forensic Scandal Brewing in Tennessee?

First degree murder charges against a mother accused of killing her daughter were dropped in Franklin County Tennessee.  The mother was believed to have administered a fatal dose of drugs to her disabled teenager, but the toxicological tests were performed by  "forensic pathologist Charles Harlan, a former Metro and state medical examiner who is under a threat of having his medical license revoked by state officials who say he has conducted questionable autopsies." Jack Chin