Revealing mistake: In the second murder, the killer of the first one is bashed in the head by a monkey wrench, her head split open. A second hit ensues, but there's no reaction to it, no further spraying or damage, the head itself barely moves, and with delay. (00:04:30)
Revealing mistake: The protagonist figured out that the killer is following the "Shaggy Peter" nursery rhyme and explains it to his colleague. A close-up of the supposed killer follows, putting together an album with obituaries. The obituary to the left is an obvious fake; its bottom half begins with half a word mid-sentence, and it mentions a daughter-in-law; the actress Greta Vayan playing the victim - a prostitute - was in her early 30s. (00:07:50)
Revealing mistake: Lomenzo needs to search through the police archive, and his coworker guides him through it. He opens a drawer where there are 3 folders containing case files starting with the letter A (including a ludicrously generic "Associates"). When he opened it, the labels on the front of the drawers were all starting with letter V. (00:10:35)
Revealing mistake: When the prostitute is grabbed by the villain, he stuns her with a smack on the top of the head, since the strangling did not seem to work all that well. Thing is, she goes limp only a second after the sonic boom of a sound effect. She also somehow stays perfectly straight against a tree; she sleeps on her feet like a horse, evidently. (00:15:35)
Revealing mistake: When the mistress is burnt alive, she does not seem all that bothered, and simply pulls at ropes blatantly too loose to hold her, which constrain her just at her neck - in fact she pulls at them so weakly probably to avoid ruining the prop. It should also be noted that it's a normal rope, and yet it's perfectly intact after the fire that devastated her face and coat. (00:16:50)
Revealing mistake: In the close-up of the supposed killer updating his album with the obituary of the politician murdered on air, amongst the listed surviving family members of the male politician there's also a husband. Not quite likely. (00:28:50)
Revealing mistake: Lomenzo and his partner pay a visit to the neighbour of the suspect. She is powdering her face, or so it should be; you can tell the brush has no blush, and the powder box is empty (you can see almost the entirety of it when she tips it during her chat, and it's squeaky clean inside). (00:38:20)
Revealing mistake: At the pork processing plant, a close-up from an Italian newspaper "Corriere della sera" shows news from November 18, when it's established from previous conversations that the killer was captured on November 30th, so it should be a December newspaper. (00:53:00)
