Yes, execution does prevent the same person committing more crimes... or any crimes at all in the case of the innocent. Prison also does that, somewhat less ef

Yes, execution does prevent the same person committing more crimes... or any crimes at all in the case of the innocent. Prison also does that, somewhat less effectively, simply by denying them the opportunity, though it's significantly less final and it's not exactly perfect because they could still hurt other guards/inmates, escape, etc. The real problem with them is whether there are better ways of accomplishing the goal of reducing crime.