Dr. Sam Shephard

After watching the documentary "The Killer's Trail", you witnessed the investigation of the murder of the wife of Dr. Sam Shephard. Please comment to this post with information about Shephard's case. You will need to look up a little more background information. Try to include your perspective on the case (i.e. what influenced the investigation, related evidence, etc.) and some facts the rest of the case may be interested in knowing that you find relevant.