If you call the ASPCA they will have no choice but to put it down. Any snake that size and that is aggressive they will refuse to give to anyone. If you call the police the same thing will happen, the police don't have a clue so they will call the ASPCA and the animal will end up in the same hands. Your best bet is to try and contact a breeder or hobbiest and have them take in the snake, thats the only way I see a large agressive snake not being put down, even the non profits might put it down seeing as the snake is aggressive and will grow much bigger. Just my 2 cents, thanks for the rescue though.