1 / 15

Archbishop Desmond Tutu - The South African peace advocate has lent his international influence to Davis’s cause. “To take a life when a life has been lost is revenge, not justice,” Tutu said.(Photo: REUTERS/Lucas Jackson)

2 / 15

Former President Jimmy Carter - Carter has been an advocate for Davis since 2008."This case illustrates the deep flaws in the application of the death penalty in this country," said Carter. "Executing Troy Davis without a real examination of potentially exonerating evidence risks taking the life of an innocent man and would be a grave miscarriage of justice. The citizens of Georgia should demand the highest standards of proof when our legal system condemns on our behalf a man or woman to die."(Photo: REUTERS/Chris Wattie)

3 / 15

Pope Benedict XVI - The Vatican spoke out publicly on behalf of Davis back in 2007."The Pope continually exhorts all people, and especially those men and women who serve in government, to recognize the sacredness of all human life," wrote Monsignor Martin Krebs on behalf of the Pope. "I reiterate the commitment of the Holy Father, Pope Benedict XVI, to uphold the sacredness and dignity of all human life, and I hope that you will give heed to his petition.”(Photo: AP/Riccardo De Luca)

4 / 15

Former Rep. Bob Barr - The former Republican congressman and federal prosecutor supports the death penalty, but still finds Davis’s execution unwarranted.“I am a longtime supporter of the death penalty. I make no judgment as to whether Davis is guilty or innocent,” Barr wrote in an editorial. “But imposing an irreversible sentence of death on the skimpiest of evidence will not serve the interest of justice. By granting clemency, the Georgia Board of Pardons and Paroles will adhere to the most sacred principles of American jurisprudence, and will keep a man from being executed when we cannot be assured of his guilt.”(Photo: REUTERS/Yuri Gripas)

5 / 15

Renate Wohlwend - The Representative of the Council of Europe's Parliamentary Assembly has used her platform to bring awareness to Davis’s case."To carry out this irrevocable act now would be a terrible mistake which could lead to a tragic injustice,” Wohlwend said speaking of Davis’s execution. (Photo: Courtesy Assembly International)

6 / 15

Former Deputy Attorney General Larry Thompson - The ex-Justice Department official wrote the Georgia Board of Pardons and Paroles and said, “I do not know if Troy Davis is innocent, but it is clear now that the doubts plaguing his case can never be adequately addressed. On this basis, I urge you to uphold the values expressed in your 2007 statement and grant clemency.”(Photo: Courtesy US Government PD)

7 / 15

Rev. Al Sharpton - The civil rights leader tweeted, “This is the most blatant example of injustice I have seen in years. This is WRONG,” after the Georgia Board of Pardons and Paroles denied Davis clemency on Tuesday.(Photo: Spencer Platt/Getty Images)

8 / 15

Former FBI Director William Sessions - The one-time FBI director also supports Davis’s bid for clemency."There will always be cases, including capital cases, in which doubts about guilt cannot be erased to an acceptable level of certainty," wrote Sessions, who served under presidents Reagan, Bush and Clinton. "The Davis case is one of these, and it is for cases like this that executive clemency exists." (Photo: Courtesy FBI archive United States Government)

9 / 15

NAACP President Benjamin Todd Jealous - The NAACP has been one of Davis’ most active supporters and its president, Ben Jealous, feels personally connected to Davis’ mission.“When I was a young organizer I met Troy’s sister 15 years ago and she made me promise that if she produced the evidence, I would make sure people fought hard for his case, and I plan to keep that promise.”(Photo: Charley Gallay/Getty Images)

10 / 15

Paris Bar Association Chairman Christian Charrière Bournazel - Bournazel has also shown his support for Davis, helping to bring international attention to Davis’s plight.“This is about accepting that human justice is relative, while the death penalty has an absolute character,” Bournazel said, speaking of the Davis case.(Photo: JACQUES DEMARTHON/AFP/Getty Images)

11 / 15

Sister Helen PreJean - The anti-death penalty advocate has spoken out against Davis’s sentence, recently tweeting, “7 out of 9 eyewitnesses recanted. No physical evidence. Stop the execution of Troy Davis.”(Photo: Patrick Riviere/Getty Images)

12 / 15

Rep. Shelia Jackson Lee - The congresswoman supports Davis’s clemency and also wrote to the Georgia Board of Pardons and Paroles on his behalf.(Photo: Chip Somodevilla/Getty Images)

Photo By Photo: Chip Somodevilla/Getty Images

13 / 15

Sen. Carol Moseley-Braun - Moseley-Braun has been an advocate for Davis since 2007 when she wrote the Georgia Board of Pardons and Paroles on his behalf.(Photo: AP/Charles Rex Arbogast)

Photo By Photo: AP/Charles Rex Arbogast

14 / 15

Rev. Jesse L. Jackson Sr. - Jackson agrees that there is too much doubt to execute Davis.“The execution of Troy Davis will be a grave injustice and moral outrage,” said Rev. Jackson. “Not only was there reasonable doubt, there was substantial doubt. We won’t be any safer on Thursday if his life is taken from him on Wednesday. There is something toxic in the wind. His death, offered on the wind of politics, will only be a false relief. Pilate tried to wash his hands of responsibility for state-sanctioned execution. It didn’t work.”  (Photo: Chip Somodevilla/Getty Images)

15 / 15

Rep. John Lewis - Lewis and other Georgia members of Congress banded together to speak out in support of Davis.“Over the last four years, the inability of our courts to resolve these uncertainties has shaken public confidence in our judicial system, and an execution under such a cloud of doubt would do nothing but further undermine that confidence. Public faith in the integrity of justice in Georgia is at stake and it is for this reason that we urge you to grant clemency for Troy Davis,” they wrote.(Photo: Ethan Miller/Getty Images)