In 1991, Dorothy Donovan was murdered in her Dover, Delaware home and police are skeptical when her son Charles Holden stated that she was murdered by a hitchhiker he had picked up. Their suspicions were heightened when he refused to take a polygraph test and they turned to forensic science. Would the blood and fingerprint evidence at the crime scene support Charles' story or prove his guilt? The case went cold for many years until the DNA of ex-con Gilbert Cannon linked him to the crime.
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