NEW : Troy Davis 's sister says she is disappointed and will keep fighting . The evidence Davis presented is `` not credible '' or `` smoke and mirrors , '' court finds . In June 2009 , Davis supporters delivered petitions bearing about 60,000 signatures to Chatham County , Georgia , District Attorney Larry Chisolm , calling for a new trial . Score: 6 He was convicted in 1991 but witnesses have since recanted their testimony .
NEW : Troy Davis 's sister says she is disappointed and will keep fighting . The evidence Davis presented is `` not credible '' or `` smoke and mirrors , '' court finds . Score: 6 He was convicted in 1991 but witnesses have since recanted their testimony .