Forensic Files

Stranger in the Night (13x11)

Air date: Dec 19, 2008

The Dorothy Donovan Case. Police are skeptical when a man claims his mother was murdered by the hitchhiker he picked up. Their suspicions are heightened when he refuses to take a polygraph test, and they turn to forensic science. Would the blood and fingerprint evidence at the crime scene support the man's story, or prove his guilt?