Require police stations to register their callback number for EDRs. Require a response before releasing information. You still have the issue of vetting each p

Require police stations to register their callback number for EDRs. Require a response before releasing information. You still have the issue of vetting each police station, but you can do that once before the EDR comes in. Then when the EDR comes in, you call that number, confirm the details. It can still be hacked, but not nearly as easily as a random officer's email account.