Apparently toxicology reports are pretty standard in autopsies. Here's an article on it from Web MD which might answer some of your questions.

One point they make is that these reports take longer in real life than they do on the TV crime shows.
_________________________
Boomer in Chief of Boomer Women Speak and the National Association of Baby Boomer Women.
www.nabbw.com
www.boomerwomenspeak.com
www.boomerlifestyle.com
www.boomerco.com