This was actually a huge problem in medieval times. The people back then adhered to the existence of the death penalty, but they also didn’t see it as anything aside from a kind of state sanctioned murder rather than how you’d expect many people to see execution. Executioners were thus highly stigmatized, to the point where we have that stereotype today of medieval executioners having that black veil over their heads to conceal their identity, and out of necessity, the role of executioner was inherited like that of a monarch rather than acquired, since often nobody would’ve otherwise sought the job. Executioners were considered so much of an outcast and felt so little incentive to be executioners that it was medieval law that they would get a lifetime supply of free food in order to reduce the burden of the job. They were considered a hesitant necessary “evil” that put a cap on other “evils”, like adultery (oh the horror). Or so they say.

Times have evolved though, and I go by a different school of thought (schools of thought where it’s much more difficult to get to the bad place and stay there if your intentions are good). I cannot help you out of legal issues should something happen, but I have faith that doing what you consider to be a favor won’t be eternally punished.