Corrected entry: Kirsten Dunst refers to Alex wearing makeup several times, even though he is not wearing any at all, the marks on his face are the results of burns.
Corrected entry: When Alex finds the evidence from his case, he finds the knife used to kill his girlfriend. Even though the knife was found at the crime scene, it is perfectly clean, like new. Since it was evidence the police would left in storage just like they found it.
Correction: The knife could have been cleaned by the bad-guys who planted the knife in Alex's car. But it could also still have a slight trace of blood on it, but not enough to really see.
Correction: She thinks it's make-up because the way it is around his eyes looks similar to make up.