Continuity mistake: After the dog is killed, Garfield goes out of the backyard. Left of him towards the door of the backyard, you can see the track for the camera.
Continuity mistake: After Trevor shoots himself towards the end, blood gets on Cesar's clothes, but in the next shot the blood is gone.
Continuity mistake: When Trevor is going to ask Cesar if he knows who vandalized bungalow 86, Cesar's hat is frontward, but as soon as Trevor walks up his hat is backwards and it does this when the camera is behind Cesar.
Continuity mistake: In the scene when Dave sits down next to Trevor he unfolds a newspaper; the camera looks at Trevor and then goes back to Dave and the newspaper is gone.
Continuity mistake: After Stevie Littleton comes out of the restroom where he confronted Trevor Garfield for killing his friend, he goes and tells his friend Cesar. Look closely at Cesar's glasses - at first he has him covering his eyes then after some people pass his glasses are on the back of his head.
Continuity mistake: In the opening scene Samuel opens Dennis' text book which says '187 Garfield' on every page. When he brings the same text book to the principal and opens it, it only says 187.