Seven witnesses have since changed their testimony. Darrell Collins, a friend of Davis', said in an affidavit that he initially denied that Davis was involved in the murder, but "after a couple hours of the detectives yelling at me and threatening me, I finally broke down and told them what they wanted to hear. They would tell me things that they said had happened and I would repeat whatever they said."
Another witness said she was on parole and feared she would be sent back to prison if she did not tell police that Davis killed MacPhail.
"We need to have a day in court where a judge hears the evidence and explanation showing why that person likely did testify falsely," said Jason Ewart, Davis' lawyer at Arnold and Porter in Washington, D.C.
Davis is now focused on his family and friends, said his sister Martina Correia who visited him Monday.
"He's more concerned about us than he is for himself," she said. "He says God has given him peace. If his life is given, it's not given in vain because people will make a stand against what's happening in Georgia."