Car accident with a police?

So my husband had a car accident with a police officer.... The cop ran a red light with out having his siren on and even though both my husband and the cop tried breaking it was too late... My husband's car got pretty damaged no one was injured or taken to the hospital. They didn't give my husband a citation because it wasn't his fault all they gave him was a case number to give to his insurance and they let him go. Our insurance is having to cover the damage and we are having to pay the deductible from our pocket. Also after that day he has had really bad headaches so i tried scheduling him an appointment to see a dr but they asked me if he had been in any accident so i said yes and then they told me that they couldn't see him because they might need papers signed by a lawyer.... so my question : should we hire a lawyer or would we be wasting our time? has anyone been through something similar?