Other mistake: When Lomito was holding the little green ball with the smiley face on it, her flashlight was shining on her fingers/fingernails - all of which were long and manicured. The length of her fake fingernails - even if they did not exceed the department's policy on maximum length, such as one-fourth inch past the fingertip - probably were long enough to interfere with her ability to quickly put her finger on her pistol's trigger and shoot; the length interfered with her ability to perform her duties. (00:31:25)
Character mistake: The new sheriff ("Alice") told Rayburn that she has only been sheriff for a couple months and was still catching up on active cases. Rayburn replied, "Yeah, my daughter's case is far from active." The sheriff then told Rayburn, "My training is very different from the officers around here" - meaning college-educated (Ivy League?), more professional, more effective, and modern. Despite this, some of the sheriff's actions (e.g, walking unannounced into suspects' houses and/or without a proper warrant; questionable "probable cause"; shooting Rayburn to protect her brother) fell far short of the ideal. Perhaps most significantly, the sheriff gave Rayburn a warning shot and told him not to kill Dr. Boone... then she stood back and merely watched Rayburn push Dr. Boone into the pitfall and close the doors while knowing the doctor was severely injured and dying. These things do not show her purported superior training. (00:21:43 - 01:25:34)
Continuity mistake: After Wes was clobbered and on the floor, he had a long stream of water/mucus coming out of his nose or mouth and his lips were wet when he was standing up, but his lips/mouth/nose were totally dry when the killer put his gloved hand over Wes' right shoulder. (00:33:40)
Continuity mistake: First argument. Leilani shouts "Why are you being so loud right now?", with a hand behind her neck. She does not start the next shot in that position, she puts her hand there only a second later. (00:04:05)