Wow what a great idea, I wonder why nobody else has ever thought about it.

I’d argue that a prosecutor is more guilty of a bad death sentence than a jury. The jury only hears what’s brought into court. If the prosecution are withholding evidence or didn’t do their due diligence on collecting evidence then it’s not the jurors fault. The jury was lied to, and it’s the prosecution’s job to bring forward all evidence, not just the stuff that supports their case.