So my friend got into a car accident and it was not his fault. He got rear-ended and it wasn't a major crash. His bumper and truck were damaged badly but the car still drives. He didn't seem to suffer any injuries from it. He and the lady who rear-ended him exchanged information. He talked to the insurance company and got reimbursed for his car repair and everything seemed to be taken care until recently he complained that his neck started hurting and he thinks it's from the accident. Can he sue even after receiving the policy settlement for his car damage?