John Trestrail, is the foremost authority on criminal poisoning and murder by poison.
He is the Director of the "Center for the Study of Criminal Poisoning"
His current research project involves the "psychopathy" (criminal psychology) of the homicidal poisoner. The goal of his pioneering research is to determine if commonalities exist in this type of criminal offender.
Murder by poison is one of the most difficult methods of homicide to detect, and most often goes unnoticed. The key to detecting murder by poison is summed up by "all deaths with no visible signs of trauma must be considered a poisoning, until facts prove otherwise!".