This turmoil all started after a 5 year old girl got into a coma after being sedated in a dental clinic in Chicago.  She was given 3 different sedatives and after the dental work was done, she never woke up, this following link is to the CBS News page which has an interview with Dr. Edward Fisher.

http://www.cbsnews.com/stories/2006/09/27/earlyshow/health/main2044768.shtml