Exhibit A: The Secrets of Forensic Science

A firearms expert uses forensic science to try to solve a matron's murder. Host: author Graham Greene.

After discovering his ex-girlfriend murdered, a man finds a threatening message scrawled in lipstick on the living-room mirror.

A student finds a stranger dead in her bathtub.

A splinter of wood holds clues about a double homicide.

Efforts of a forensic biologist to stop a man from infecting his lovers with AIDS. Host: author Graham Greene.

A shoe print leads a forensic identification officer to a suspect in a robbery. Host: author Graham Greene.

A forensic toxicologist helps find the suspect sexually assaulting women who have blacked out. Host: author Graham Greene.

A sleep expert tries to determine if a man could have been sleepwalking when he murdered his mother-in-law.

A forensic pathologist and DNA expert solve a mystery when a leg bone washes up on a shore.

Experts on documents and chemistry are brought in to determine whether a check and a lottery ticket are real or forgeries.

DNA profiling helps solve the murder of a vivacious teenager.

Just as a woman is about to be cremated after a traffic fatality, a blood spatter analysis is needed to determine if it really was an accident.

A criminal profiler helps explain the murder of a Montreal coed.