That's why my "death of humanity" sentence is a much more viable alternative to the death sentence. It's the same thing as "special custody" (23 hours a day in a small room, lights always on, little human contact, etc) but with a few revisions:
No direct human contact with the exception of guard intervention and health care provision.
No verbal/visual visitation except for human rights watchdogs (to ensure you are still alive), clergy, and legal counsel (through plexiglass)
No written correspondence, except legal counsel.
No reading or writing materials
No music
No television.
No personal items in the cells, save your bedding, paper gown, and slippers.
No windows.
Lights always on.
Cell confinement 23 hours a day.
1 hour per day for escort to a shower and exercise room.
And..that's it. You get your life.
Compensation for the wrongly sentenced will include psychological care, financial compensation of $100,000 dollars (after taxes) per year of sentence, and a formal written and visual (televised) apology and retraction by the sentencing judge and prosecution, if available. Copies will be provided for the wrongly convicted in case anyone in the future has any question as to the innocence of said-person.
Voila, problem solved. That ought to settle people down.