Only thing I can think of is to aggregate as much evidence as you can and load it onto a USB drive. Then mail that USB drive to all the police stations without putting your return address on it, or putting the mailing address also as the return address. Dont drop it off at a USPS office, as they all have cameras if im not mistaken. Best bet would be to drop it into a USPS dropbox that doesnt have any cameras pointing towards it. If ALL politicians, cops, etc got a copy of all this shit, SOMEONE has to fucking do something about it.