The Chicago Tylenol Murders: A Case Study in Forensic Toxicology

Research the Chicago Tylenol Murders and discuss the case in-depth and how toxicology solved the murders.
Include the following:

List at least two significant challenges forensic toxicologists faced when attempting to identify drugs present in a body.
Why is knowledge of an individual’s history of drug use important in evaluating drug concentrations found by a toxicologist?