Troy Anthony Davis is scheduled to be executed tomorrow in Georgia for the murder of a police officer in 1989.
But his lawyers, and thousands of supporters, including the Pope, Jimmy Carter, Desmond Tutu and the European Union, contend that Davis is innocent.
They say that he was found guilty despite no physical evidence, and all but two witnesses later recanted their testimony, saying they were pressured by police to lie on the stand.
Sarah Varahat is a Portland activist who has been trying to get Davis exonerated since 2004: