`` Troy 's innocent , so we 're going to keep fighting . NEW : Troy Davis 's mother says she is disappointed and will keep fighting . The evidence Davis presents is ` ` not credible '' or ` ` smoke and mirrors , '' she says . Davis faced execution for killing an off - duty police officer in 1989 but insists he is innocent . He was convicted in 1991 but witnesses have since recanted their testimony .
NEW : Troy Davis 's mother says she is disappointed and will keep fighting . The evidence Davis presents is ` ` not credible '' or ` ` smoke and mirrors , '' she says . Davis faced execution for killing an off - duty police officer in 1989 but insists he is innocent . He was convicted in 1991 but witnesses have since recanted their testimony .