At the end of the film, Garrett is reading his notebook and has the right index finger placed behind the next page in position to turn the page. However in the next cut which is a reverse shot the orientation of his finger changed. He now has his fingers behind the book and then places his index finger at the top of the page to turn it.
Gross annual income is calculated from actual leased units. There is no need to adjust for the vacancy rate. So, the valuation of the property in Bernard's question will be $880,000, not $800,000.
The sign for Mainland Bank indicates that it is a state-chartered bank. The Office of the Comptroller of the Currency oversees federally-chartered banks. Later in the film, the senator refers to "two national banks." The Marlin bank IS depicted as a national bank.
Property Purchase Agreements have a date on them however the one between Kim and Barker does not have one listed.
The film states that the population of Willis, Texas in 1963 was 9320 however this appears to be incorrect. According to the Willis website, the population of Willis was approximately 900 from 1933 to 1963. According to the US Census website, the population in 2022 is approximately 6939.
In the exterior shots of the prison, just before Joe and Eunice pick up Bernhard, compact remote cameras, razor wire, and one-way glass on the watch-tower, are all visible. No prison in 1968 had such high-tech equipment, which would only become the norm in the late 80s and 90s.