911 problems continuned in seattle

I recently reported that the seattle police dept. had refused to turn over 911 call recordings,and now after filing for the same calls with the seattle fire dept, I was told i9n their response that 911 calls are not kept more than 90 days after the incident. That was never the responds for the seattle police dept. I think it is terrrible miscarrige of justice that is taking place in seattle. Should public records be only kept for 90 days? Are they not permanent esp. if a shooting has occured and a death from that incident occoured also? Is this standard polciy across the USA? If anyone knows the policy for 911 calls being kept for a permanent record I would apprciate the info.