The dog needs to be put down, animal control's an idiot, and the cop's just dumb. Call the police tomorrow, insist an officer come and take your statement, and then get an injury lawyer. This was a dog attack, you were injured, and it's not your fault. Then sue for medical and vet bills, you had a witness to the attack, nice and simple. Ask for copies of the xrays and hospital and vet reports, and explain why, more importantly remind them what would happen if it's a child that's attacked next as the dog "acts like a dog".