Sign of the Zodiac: Solving the Final Cipher

A case that has baffled police, reporters, and the general public for over 50 years. The Zodiac Killer terrorized Vallejo, California and the Bay Area during a year-long killing spree, taking the lives of at least 5 people, possibly more. A multinational team of computer programmers believe they have finally solved the 4th and final cipher sent to newspapers presumably by the killer.