Atkins, who has been declared terminally ill, was denied a compassionate release from prison in July 2008.

CNN: New prison photo of Charles Manson released

Atkins' compassionate release was opposed by Tate's sister, Debra, Los Angeles County prosecutors and California Gov. Arnold Schwarzenegger, among others.

CNN: 40 years after Manson murders, a bid for parole

In 2007, the department received 60 compassionate release requests, Thornton said.

CNN: Prison boss opposes release of ailing ex-Manson follower

Terminally ill inmates rarely are allowed compassionate release, records show.

CNN: Ailing Manson follower denied release from prison

After her release on compassionate grounds in 1980, she married the actor Stephen Rea.

BBC: Ex-IRA woman Dolours Price's funeral takes place

In February 2009 Biggs fell ill with pneumonia, prompting fresh calls for his release on compassionate grounds.

BBC: Profile: Ronnie Biggs

They were swayed by their considerations about the need to release him on compassionate grounds -- grounds that I think were completely wrong.

WHITEHOUSE: President Obama and Prime Minister Cameron at the White House | The White House

He also made clear that the decision to release the terminally ill bomber on compassionate grounds was the Scottish government's, a Downing Street spokeswoman said.

BBC: Libya warned over Lockerbie man

And they did it on the basis of their law and their practice so far as the release of people in serious medical conditions on compassionate grounds.

BBC: Wikileaks: Scots not offered 'treats' to free Megrahi