Just a thought, but I got rid of 2 ground chucks that were living under my deck using subsonic 22 rounds. Penetrated all the way and my neighbor was pulling weeds in his yard and wife was 30 feet away and didn't realize what I had done. Neighbor never heard a thing. It's only like 4 bucks for 50 rounds. Sight in a good rifle at the range, wait for almost dark when they come out, pop, pick them up when it gets dark and dispose.
I say left them be outside after you shoot them... Fox or coyote will take care of the dead body