Troy Davis is set to die by lethal injection on Wednesday . She is convinced that Davis shot her son , and that the jury 's decision to convict him was fair . The parole board will hear his argument he 's not guilty of Mark MacPhail 's murder . The Savannah police officer died after being shot three times in 1989 . Advocacy groups claim over one million have signed a petition in support of Davis .
Troy Davis is set to die by lethal injection on Wednesday . The parole board will hear his argument he 's not guilty of Mark MacPhail 's murder . The Savannah police officer died after being shot three times in 1989 . Advocacy groups claim over one million have signed a petition in support of Davis .