One commutation request Huckabee rejected as governor was that of convicted rapist Wayne DuMond.
Police fear there may be more victims of a rapist convicted of attacking four women.
Under the existing laws, a rapist faces a term of seven to 10 years.
Mr Singh said the alleged rapist had been arrested and a case had been registered against him.
The case involves a convicted rapist and murderer who argues that the injections may be unnecessarily painful.
Jailed rapist Collins, from Ipswich, was arrested when his fingerprints were matched to the 1987 crime scene.
He said the Barbados authorities needed "to apologise to Rachel publicly, reopen the case and find the rapist".
His father was a convicted rapist and Hinton had previous convictions including burglary.
Washington (CNN) -- The FBI has added an alleged murderer and rapist to its Ten Most Wanted Fugitives list.
An Indian judge on Thursday sentenced a rapist to 10 years in prison, just eight days after receiving the case.
Convicted killer and rapist Michael Morales was scheduled to die by lethal injection just after midnight at California's San Quentin prison.
Earlier this year the watchdog criticised the force because it had not taken seriously enough the investigation into cab-driving rapist John Worboys.
You know I think there should be some punishment, but the punishment ought to be on the rapist and not attacking the child.
Police described the former TA Parachute Regiment captain as "a predatory rapist" and said they feared more women may have been his victim.
Nor could the theft of money and a mobile phone from the flat be used to bolster the allegation that Mr Mutebi was a rapist.
In 1998 an imprisoned serial rapist in Washington State was caught sending suggestive notes to callers who were giving their addresses to request information about state parks.
The CODIS system can also help investigators more easily link a series of crimes to one person as was the case of the recent Long Beach rapist.
CNN: Solving the cold case: Time, DNA and ingenuity can help
But at the end of August she was found living in a warren of tents and sheds in a convicted rapist's overgrown back yard in Antioch, California.
ECONOMIST: A horrible case shows the need for competent policing
Earlier this year, international outrage erupted over the plight of a 16-year-old Moroccan girl who committed suicide after a court ordered her to marry her rapist.
Blunders by police hunting the Night Stalker rapist - including a failure to probe a sighting of his car - left him free for years, a report has said.
The developments in DNA technology threw up a link between Witton Park and another rape attack near Leigh and as a result a link with a family member of the rapist.
The case of Naomi Bryant, murdered by a released rapist, and John Monckton, whose killer was also being supervised, generated negative press coverage and questions about the nature of Probation Service supervision.
The men include the 'Bermondsey Beast' rapist Michael Roberts, 46, who became one of a small group of "life means life" prisoners after raping three victims and attacking a fourth in Bermondsey, south London.
The court is hearing a plea to end the life of Aruna Shanbaug, a nurse in Mumbai who has been paralysed and considered "brain-dead" since she was attacked by a rapist in November 1973.
They were thoroughly humiliated by Bush senior's attack dog, the late Lee Atwater, who used everything from the state of Boston harbour to the activities of Willie Horton, a murderer and rapist, to destroy Mr Dukakis.
Their documentary examines the notorious case of five teenage boys from Harlem who were sent to prison for the 1989 assault and rape of a white middle-class woman in Central Park, a crime to which a known serial rapist confessed many years later.
WSJ: History Spawns Peak Films at Telluride Film Festival | By Joe Morgenstern
He was greatly hurt by this - his name had been splashed across the papers as an alleged rapist, he had subsequently been proved innocent, and yet the press were not interested in reporting his innocence as widely as they had reported his alleged guilt.
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