The Hunt for the Zodiac Killer - Season 1 Episode 4 -
The Secret FBI Files
The hunt goes into high gear as the FBI releases secret files on the killer; a handwriting analyst connects the Zodiac's letters to a taunting letter mailed 3,000 miles away in Albany, N.Y.; the code team has a massive breakthrough on the Z-340.
Please explain the problem in a few words.
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