Trouble with the firing squad is that it produces blood and mess. A gallows, on the other hand, is quick, clean and presents an opportunity to sing hymns before the trap door is sprung, thereby giving the ACLU and the anti-capital punishment crowd a double dose of two of the things they hate most.
The noose is not always quick.
A case in Kansas proved a “hanging” could last a half hour.
Oh hell...just put a big tarp under him....shoot, roll and shovel....