You show no specific location within the states. It is possible you can find local folks in a fish club who might take it. You may be able to post on sites known to be good for posting this sort of thing and finding help in a specific geographic area. Where are you?
Please do not kill the fish, there should be better options available that can be found without a lot of effort. That size angel should be in demand in most places.
You can start by looking here: http://www.theangelfishsociety.org/
if you are willing to give the fish away and let people pick it up, these two forums USA wide members and have pretty active forsale/wanted sub-forums:http://www.monsterfishkeepers.com/forums/http://www.aquariacentral.com/forums/