A sniper attempts to evade the police by scratching off the serial number of the gun he used to kill a man but police are able to make the number reappear.
Seattle area terrorized by a serial arsonist that seems to have no rhyme or reason starting more than 100 fires and investigators use several techniques.
In the case of Troy Graves, a serial murderer strikes in two separated states, wreaking havoc and unleashing fear wherever the victim's bodies are found.
Woman appeals her conviction for the murder of her mother in a car fire and is released but an expert witness provides new information when she is retried.
In 1962, the small town of in Hanford, Calif., is shocked when a 15-year-old girl is murdered, and after 24 years, microscopic evidence brings justice.
An elderly woman is brutally murdered inside her home during a robbery gone wrong, and the only clue is the fact that she had scheduled a chimney cleaning.
Three men wearing masks attack a wealthy couple outside their home, leaving the husband dead and forcing the wife to give them the code to their hidden safe.
Police are hesitant to believe the story of a 12-year-old girl who claims she was kidnapped and sexually assaulted due to her apparent lack of emotion.
A homicide investigation is impeded by a badly burned crime scene, but forensic scientists are still able to find enough clues to apprehend a trio of killers.
When a rebellious teenager disappears, a search turns up clues that lead investigators on a hunt for a killer, and forensic evidence will reveal the truth.
While vacationing in Florida, a mother and her two daughters disappear and are later found dead in Tampa Bay, leaving no evidence behind until five years later.
When four teenagers are murdered in an otherwise peaceful suburban town, their killings go unsolved for three years until a composite sketch sparks new leads.
After a young college student's death is ruled a homicide, police immediately suspect the victim's boyfriend, but DNA points them in a different direction.
When detectives investigate a middle-aged man's murder, they determine that robbery may not have been the motive after discovering a mysterious greeting card.
A son finds his father dead in their home and calls 911, but when ballistics clear the only suspect, police have to rely on DNA evidence to find the killer.
In the case of Troy Graves, a serial murderer strikes in two separated states, wreaking havoc and unleashing fear wherever the victim's bodies are found.
Scheduled to testify against a man who robbed her, a woman is killed days before the trial, and the accused man has a time-stamped videotape as his alibi.
Several attacks happened in 1993 to Florida tourists, causing police to investigate using one major piece of evidence being a bite mark left on a victim.
When a man loses a second wife to an accidental drowning, medical examiners look for similarities between the two deaths, suspecting they weren't accidents.
In Peoria, IL investigators find an nondescript print where a man has been murdered and two teenage females were savagely attacked; the girls couldn't assist.
Firefighters responding to a house fire are shocked to discover an entire family burned to death inside, and police believe it was a case of murder-suicide.
Solving the double homicide of a homosexual couple and a series of California hate crimes takes investigators into the sordid world of White Supremacy.
Investigators are disturbed to find no forensic evidence at a murder scene, but they feel certain that the victim's canine saw the killer and can provide clues.
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