Check this thorough, in-depth analysis of a big problem in North Carolina provided by the Charlotte Observer:
Each year about 75,000 North Carolinians die. A medical examiner is called in to investigate about 10,000 of those deaths because the circumstances are suspicious, violent, accidental or unattended.
That’s where the trouble begins. The state requires no training for its medical examiners. And it pays them a paltry $100 per case. As a result, many deaths get little attention.