Factual error: In the early scene when they enter the "It's a small world" ride at the '64 World's fair, the monorail in the background runs way too fast. The actual one moved very slowly. Also the monorail would not have been visible from the Pepsi Pavilion.
Factual error: The limo used in Louisiana has a front license plate and it's a Louisiana plate. Louisiana only issues a rear plate.
Factual error: Michael's wife meets with Longo in prison, and she has an iPhone. The trial was in 2003, 4 years before the introduction of the iPhone in 2007.
Factual error: Set in San Francisco, the main female character keeps referring to herself (and so do others addressing her) as "Detective Maggie Price." San Francisco is the one place in the US where the correct designation for a detective is "inspector."
Factual error: The search that cracks the case is nonsense from a simple logical standpoint. There are three people, whose deaths have never been related together, but that all died because of tetryzoline poisoning. Entering all three of those names in google would not produce relevant results or even narrow the spectrum, because it's three unrelated deaths. (01:08:40)