Plot hole: It is highly unlikely that something as unusual and noticeable as a long severed ponytail would have been overlooked at the crime scene where Bob was shot when it was originally combed for evidence. Especially after Vanessa told the police he'd done it; they would have looked for it as evidence.
Other mistake: Vanessa is illiterate, but easily reads the Hi-Way Café menu. (00:48:35)
Trivia: The film is loosely based upon "Little Red Riding Hood."
Question: Why does Bob Wolverton have a psychology manual in his car when he's a children's psychiatrist?
Answer: Even experts in a given field occasionally like to consult a text on the subject.
Tailkinker ★