I would definitely want to see them prosecuted. However, the sentence should probably be light. I’m not perfectly familiar with the justice system, so I don’t know how much of this is currently the case, but I think vigilante justice should result in smaller punishments than for example if the reason of the murder was personal gain. If it can actually be proven that the murder victim did those terrible things they were killed for, depending how terrible those things are, the sentence should be reduced. If for example someone killed Hitler, there should be no punishments for this murderer.

Of course that allows murderers for personal gain to claim they did it for vigilante justice, but they would have to find something they can actually prove their victim to be guilty of. This will probably be hard. But I think if they actually find something on the victim, as twisted as it sounds, I think it’s actually fine if the sentence gets reduced. Because in the end I think the murder of an unpunished morally bankrupt person is less bad than the murder of a completely innocent person.