I can't find a single thing wrong with the execution of this film.
>eyewitness testimony being reliable
>eyewitness testimony 30 years after the fact being reliable
small complaint but it was so obvious. "if we just make him appear certain people will forget how shit eyewitness testimony is"
The only problem with the film is that the most important detail explaining Lewis' character behaviour was entirely cut from the final film.
And that detail is that he was sterile, which explains his anti-pathy towards people.
Revealed by someone in the film's production whose interview I read a few years ago.
Would explain the whole story, but the director decided to leave it out to make it more ambiguous for viewers.
I've got a flaw - everytime it's discussed it brings autistic Zodiac tinfoil hatters out of the woodwork to complain about it not dealing with their pet theory that the real killer was Toschi or Ronald Reagan or the Unabomber or whatever.