These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Critical Research Failure: Charlie repeatedly states early on that he was in a "maximum security federal penitentiary" but it's later shown he actually went to Pelican Bay, a state prison. The crimes he was convicted of were all in state jurisdiction too. He may have been deliberately exaggerating, though.
Crews himself, when he's sporting his gun and badge.
There are a disproportionately large number of attractive natural redheads, male and female, in this series.
Fridge Brilliance: Why does Crews love fresh fruit so much? He didn't get such treats in prison. Some fans thought this was the case before the show confirmed it in the ninth episode.
Idiot Plot: From time to time cases will be based on someone acting unusually stupid.
In "Black Friday", Charlie, Dani and Bobby are examining a crime scene at a mall just before opening. When they realize the security guard is opening the mall on time anyway, all three rush off to prevent the doors from being opened, specifically to prevent the crime scene from being disturbed. Naturally, when they get back, the body is missing.
The second episode (with the murdered bride) could easily have ended with the case solved in about 10 minutes - all the witness, Tiffy had to do was mention to the 20 or so cops in the room that she saw the murder and she would have been safe.
To be fair, she was hungover and she'd seen her brother kill her friend. She wasn't in any kind of state to make sensible decisions, especially once her brother got back to her.
Nightmare Fuel: The killer in season two who was so obsessed with being happy that he locked five people who were all about to be happy in boxes and left them to suffocate, in specially-chosen locations that formed a giant smiley face on a map.
Bobby's wife also earned some for her Moral Myopia. Because apparently having other cops distrust her husband for being Crews's ex-partner is somehow Crews's fault even though Bobby's testimony was part of what got Crews in prison—oh, and she also seems to think that that distrust is somehow a worse ordeal than twelve hellish years of prison for a crime you didn't commit.
Complete Monster: Manami s about as much a Complete Monster as a teenage girl in a normal high school setting can be. She's tried to get the protagonist and her best friend murdered, raped and possibly made into a Snuff Film. She's tries her best to make Ayumu's life a living hell, forces all the other girls in her class to either bully certain individuals or face the same sort of harsh bullying and says she aims to kill her bullying victims (be it by driving them to committing suicide or other measures).