Factual error: When the hackers are trying to steal the photo from the woman's laptop, they turn up the TV to distract her. One of them clicks the smart TV icon and starts dragging the slider to increase the volume, which is all well and good, but we then cut to the hacker hammering the up key to increase the volume instead.
Factual error: No matter how rich Emily's fiancé is, she wouldn't be out free "on appeal" and just allowed to go travelling off to Italy.
Factual error: The police are astonished that Joyce and her friends managed to get their hands on the company accounts, since they say they couldn't get them as it is a private company. In actual fact, any private company must by law provide its accounts via the Companies House website, available to anyone to view and download.
Factual error: The killer meets Doctor Nat around 11 PM. According to the police station clock, Father Jud turns himself in around half past 2 AM. By the time the body is discovered, it has been barely 4 hours, and its flesh has been thoroughly consumed by a bathtub of acid. No acid corrodes a still intact body this thoroughly in such a short time and without any further action.
Factual error: Edmond Kemper was six foot nine inches tall. When he comes home from prison at the beginning of the film, his mother is only a few inches shorter than him. That would make her huge, when instead she was much smaller than him. Likely because the actor is reported to be not much taller than average.