El Asesino Del Zodiaco [The Zodiac Killer]

San Francisco, late 1960s. The city lives in fear of a crime wave perpetrated by a maniac obsessed with the zodiac. The only clues are the anonymous letters he sends to the newspapers in a clear challenge to authority. When the main suspect is arrested and the prosecutor threatens to release him if no conclusive evidence is presented, the police department sends its best team of forensic investigators to the scene of the crime. Can this team find the murder weapon within an hour? Or will the biggest serial killer in the San Francisco Bay Area go free?