Robin went to the library because she wanted some time to herself. is that a sentence fragment?

What is wong with this sentence cameron, who has an extreme and unreasonable suspicion of other people and their motives, suffers from paranoia which is a psychological disorder characterized by delusions of persecution or grandeur, was absolutely sure that someone was following him even though he was absolutely alone and hadn't seen a car for miles and miles.

According to the police officer, the car accident could not have been avoided.

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