I was mainly speaking about the writer’s conclusion that the confessor couldn’t be convicted because of their being identical. A believable confession would negate that IMO.
Ah, I see your point. That's an interesting wrinkle -- I be curious if there is a legal angle we are missing that would protect the confessor, or at least reduce his sentence.
The article doesn't describe the current sentence. Perhaps it's a life sentence, and the twin is hoping for a lighter one? If so, that's a pretty big gamble.