Duffy Jennings

Based on The New York Times best-selling book of the same name, “The Most Dangerous Animal of All” is a four-part documentary series that explores one man's search for the father who abandoned him, only to uncover the worst: he believes his father is the Zodiac killer.

The identity of the "Zodiac Killer" has confounded investigators for years, but an unconventional character may have cracked America’s famous case.