Mistake #1: Having a lethal injection in a purse in a fashion show ... not even Carminha would've thought of that.
Mistake #2: After the crime, Lívia appeared without the purse. Where did she put it, given that she didn't go to her apartment after the crime?
Mistake #3: Why did Morena make the denouncement to Lívia, given that there was a detective friend "protecting" her mother?
Mistake #4: If the bathroom was broken, why didn't the janitor call maintenance immediately, given that such an important event was happening in the hotel?
Mistake #5: Jessica body position is slightly different after they discovered the body. Since no one touched it, how did her right arm move?
Mistake #6: Since the bathroom is a crime scene, it should've been closed for the investigation. How was Russo able to go in early in the morning and break the faucet without anyone seeing?
Mistake #7: If Lívia forgot the room key (and Morena was a witness to that), how did Russo and Wanda got in? Did they have extra keys?