Since 1976, more than a hundred and thirty people on death row have been exonerated.
No executions have been carried out since 1984, although dozens of people are on death row.
Illinois recently suspended all executions because of doubts about the guilt of those on death row.
Duncan was convicted of capital murder, and has spent the last 10 years on death row.
FORBES: Radley Balko on the Fabricated Bite Mark Forensics of Michael West
Xinhua has said the men had had their "legal rights fully respected" while on death row.
Guru, who had been on death row since 2002, was executed at Tihar jail in Delhi.
BBC: Afzal Guru hanging: Fourth day of curfew in Kashmir Valley
We will say keeping them on death row for over nine years violates their rights.
He had been on death row since 2002 and was executed at Tihar jail in Delhi.
Currently, 369 convicts are on death row, and a further 471 have appealed against their sentences.
The reports led to public calls for all of those on death row to be executed.
If Arias is sentenced to death, she would be the fourth woman on death row in Arizona.
CNN: Arias trial jury foreman calls decision 'gut-wrenching'
The end of capital punishment would spare eight men who are on death row in New Jersey.
More than 140 people are on death row in the country, a third of whom are foreigners.
BBC: Paul Beales (left) and Rachel Dougall, two of the suspects.
During his first years on death row, Willingham had pleaded with his lawyer, David Martin, to rescue him.
He has been on death row since August 2001 for a 1993 attack in Delhi which killed nine.
Many of those on death row suffer from serious mental illness, and some of these are on medication.
Kevin Spacey stars as a philosophy professor and anti-death-penalty advocate who winds up on death row in Texas.
More than 500 people are on death row in Vietnam for crimes including drug trafficking, rape and corruption.
There are 17 prisoners on death row whose mercy pleas have been rejected.
One design shows a female comic figure that was drawn by a man sitting on death row in Texas.
Prison (ph), the maximum security in Florida, and I was on death row.
If Arias is given a sentence of death, she would be the fourth woman on death row in the state.
Twenty-three other Indonesians are on death row in the Arab kingdom and an estimated 345 have been condemned in Malaysia.
Officials said Mohammed Afzal Guru, who had been on death row since 2002, was executed at Tihar jail near Delhi.
Indonesia has 114 prisoners on death row, according to a March 2012 study by Australia's Lowy Institute for International Policy.
President Susilo Bambang Yudhoyono has granted clemency to four drug offenders on death row since he took office in 2004.
As for Mr Hakamada, now 72, he is losing his mind as he languishes in solitary confinement on death row.
It has been a custom in China for the family to pay for the bullet that executes convicts on death row.
Nebraska, a state with relatively little crime, has executed three people since 1994, and currently has nine waiting on death row.
As of 2002, the average condemned inmate spent 7.3 years on death row before execution, according to state Corrections Department figures.
应用推荐