America's mercy-killing debate has taken a new twist with the case of a man who killed his wife, only to learn she had been cured of cancer.
A Nebraska judge must decide whether to send 76-year-old Vernal Ohlrich to jail after he pleaded guilty to manslaughter.
Ohlrich said he shot dead his wife, Phyllis, 74, in her hospital bed last October because they both thought she was dying of colon cancer.
Doctors had told Ohlrich that his wife's cancer had spread and was terminal, but an autopsy showed no signs of cancer in her body.
An investigation is under way to determine whether doctors got the diagnosis wrong, or whether Ohlrich misunderstood what they told him.
His lawyer is also calling the autopsy's findings into question.
What is certain is that Ohlrich grew frustrated at seeing Phyllis suffering from weeks of crippling back pain - which she believed was a recurrence of her cancer.