Forensic Files: Sign of the Zodiac (2003)
In the early 1990’s, a serial killer claiming to be ‘The Zodiak Killer‘, was hunting people in N.Y city… Terrific episode of Forensic Files that details how science was used to debunk those claims and eventually capture him before he struck again..
“For six years, a serial killer prowled the streets of New York City. He wrote letters to police and The New York Post, indicating he would kill twelve people, one for each astrological sign. Forensic astronomy, handwriting analysis, and DNA extracted from the flap of an envelope gave investigators a profile of the killer, and a stroke of luck enabled them to find him” truTV