During the scene with Jazz and Nick questioning the father of a student. The packed box labeled Board Games behind the father in the back of the car, changes from labeled to blank all through the scene.
The murdered woman's body was hidden under the wooden floor and discovered by the dog. A rotting corpse would emit strong smells and should have been discovered by someone else much earlier.
Teenage Jazz Ramsey seen in the flashbacks has different skin tone, hair color, facial features, and, most surprisingly, different eye color than the adult Jazz Ramsey.