James Taylor advanced on Helm from behind and attempted to discharge his revolver , but it misfired .
Helm was unarmed , having left his revolvers at Mrs. McCracken 's boarding house , where he was then residing .
James Taylor advanced on Helm from behind and attempted to discharge Helm 's revolver , but it misfired .
Helm was unarmed , having left his revolvers at Mrs. McCracken 's boarding house , where he was then residing .