I just ran across some great information by Christine Funk. Ms Funk is a criminal defense lawyer in Minnesota. Here is her interview of  M. Fredric Rieders, Ph.D. Dr. Rieders is a forensic toxicologist and CEO at NMS Labs.  http://www.nmslab.com/  In this interview, Dr. Rieders provides basic information about what a forensic toxicologist does and how the work can assist law enforcement in assessing the significance of toxicological findings

Here is the link to Ms Funk’s podcast on crime lab issues.