Basically, shouldn't we create a prison (meaning, instead of executing the defendant, we imprison them at the beginning, and only execute them when we are 100% sure (or rather, if the defendant hasn't proven their innocence...)))?
Or maybe we should give the mafia weapons with half-empty magazines, so they can't be sure whether they'll kill their victim or the doctor will save her?) And we can present the maniac with an inflatable axe - after all, he's a maniac, so he should not only commit atrocities but also make people laugh to death at night.;)