Synopsis

Twenty-five years have passed since the deaths of two nurses, and now Canadian authorities suspect a former Toronto police officer may be responsible. In San Jose, a garbage collector suffered a blow to the head, leaving unusual marks; decades later, a detective, utilizing forensic science, connected those markings to etchings on an antique bar sign. California investigators are hoping DNA evidence will lead them to the man who stabbed and killed a woman as she sat in her car outside a supermark