The fathers of the Origami killer's victims have been disappearing after their sons are found dead. You'd Expect: This would be a major focus of the investigation to find the Origami killer. The cops would look into the missing fathers to determine if any of them might be the killer, or if the killer is killing them in addition to their kids. Instead: This fact is almost never mentioned by the police and plays no role in the investigation.
Sometime after their sons are kidnapped, the fathers are sent a message from the Origami Killer that leads them to a package with all the instructions they'll be expected to follow to supposedly save their children. You'd Expect: That at least some of these fathers would report this to the authorities and turn over the package as evidence. Instead: Not a single one of them does this. Most of them presumably play the Killer's games and either die in the process or give up halfway. The grocery store owner in particular doesn't even open his box; he instead keeps it with him for months, if not years, doing neither his boy nor the cops any favors, all the while moaning how "no one did anything to save [his] son." And he continues refusing to speak, even when a private investigator comes to interview him about it. Granted, staying quiet at that point wasRight for the Wrong Reasons, as Shelby was actually the Killer, but the store owner had no way of knowing that.
When Ethan came to the warehouse by himself and save Shaun, Blake has surrounded him with lots of policemen. You'd Expect:He acknowledges that he is with his son and realizing he is not the Origami Killer. Instead:He doesn't and opens fire on him in front of his son. The bright side to this is that he loses his job.
"Uploaded": Blake is told by Captain Perry now that Jayden is dead, he can do whatever he wants with his ARI glasses. While working, he is tempted to try it. You'd Expect:He decided to throw it away since that he feels suspicious of it. Instead:He puts it on and enjoys it briefly before a vision of Jayden appears, hinting that he'll suffer the effects of the ARI next.
"Under Arrest" has Norman pushing and punching Blake when he is beating the crap out of Ethan. This results Blake to pull out his gun at him. If you save Ethan when he's not on the floor, he'll be there to see it. You'd Expect: Norman tells him that he's not supposed to bring a gun while in interrogation otherwise Ethan might get it which he'll do by grabbing his right hand. Instead: He tells Blake that he's out of his mind and shooting him will make him lose his job. Ethan doesn't do anything to save him.
There's also when he attempts to tell Captain Perry about it. You'd Expect: The captain will go to the interrogation and show Blake who's boss. Instead: He just tells Norman to put a sock on it, proving he's also incompetent.
Ethan's ex-wife Grace comes to the police station to talk to Norman and Blake about a few months ago, while she and Ethan were still married (taking place after Jason's death and Ethan came out of his coma), she found him talking about drowning when he returned to work. To her, it didn't make sense as if she thinks that Ethan might have a case of Split Personality after their son's death. You'd Expect: That despite all that is happening, she would know that her ex is really a good person and doesn't have to do anything with what happened when he talked of the incident. Instead: She ended up mentioning that it might be connected with the Origami Killer, giving Blake a false belief that Ethan is the Origami Killer and spends the second half of the game hunting him down rather helping him find his son and stopping the Origami Killer. Way to go, Grace.
Norman's ending, "Case Closed", has him being declared as a hero for apprehending the Origami Killer. After being part of a talk show, he wonders what to do with the Triptocaine. You'd Expect: Now that the case is over, he would consider the fact that neither the drug nor the ARI is making his mental health any better if he constantly uses it. Remembering this, he would throw away those two things and never again be using them in future investigations. Instead: He only throws away the Triptocaine. As a result, he can see the virtual tanks even without the ARI, making him go crazy permanently.
Also, the selection of whom Norman will be paired with in aiding the police in catching the Origami Killer. You'd Expect: For Captain Perry to realize that partnering a Rabid Cop who constantly uses Police Brutality and a By-the-Book Cop who uses hi-tech equipment would be a bad idea. Instead: They're paired to work the the case together and their different ideologies drive them apart and cripple the investigation.
In the ending, Ethan finds the grate Shaun is being drowned in. He is then confronted by the killer, who tells Ethan that he can have his son back- all he has to do is open the grate. You'd Expect: For Ethan to carefully walk backwards and open the grate. Instead:He turns his back on a serial murderer to open the grate! Unsurprisingly, the killer pulls out a gun and tries to shoot him. Ethan is only saved by the intervention of a cop who happens to be there for his own reasons.
That said, the killer only attacks Ethan if someone else makes it to the warehouse. If Ethan arrives at the warehouse alone, the killer lets him go as promised, and even offers to let Ethan shoot him.
The police are trying to apprehend/kill Ethan Mars, who they believe to be the Origami Killer. A swarm of them travel to his hideout and wait outside, guns at the ready...and then a lone woman comes running towards them, insisting that she has proof Ethan is innocent. You'd Expect: For one of the many cops there to take the woman aside and listen to what she has to say. Instead: Blake tells her to leave, and the other cops who heard the woman's claim just stand by. Because of that, an innocent man is nearly murdered.
Madison has a cell phone and access to a branch of law enforcement that does not require Ethan to go to the police directly to explain what's really going on and still get help finding Shaun. You'd Expect: He would call Madison, tell her everything, and then tell her to go the cops and explain, because he can still play the Origami Killer's game to buy them time while they use their far superior resources to find his son, which they are already trying to do. Instead: He convinces himself he has a split personality and does whatever he thinks it's telling him, without realizing that his alter ego can't do anything while he's lucid anyway and thus nothing is stopping him from doing whatever he wants.
After completing the Bear trial, Ethan is told his reward was in the glove compartment the whole time, something he did not need to drive the wrong way through traffic to access. You'd Expect: Ethan would take the time to carefully look over future trial locations to make sure he can't circumvent any other ones. Instead: He doesn't even try to look around, and ends up cutting off a finger when the clue he was trying to get was under a floorboard less than a foot from his chair.
It is mentioned repeatedly that Ethen was in a coma for six months after Jason was hit by the car and killed, meaning that, given the timeframe, Ethan would have been in a coma for most of the first round of killings by the Origami Killer, followed by months of physical therapy and close watch by hospital staff, giving him an airtight alibi You'd Expect: This incredibly relevant piece of information would be brought up, totally exonerating him. Instead: His wife, therapist and even Ethan himself all forget that he was in a coma for the entire first round of Killings, and either the police and/or Norman never do a background check on him, or if they do it somehow isn't on the background check.