Walker is the 50th known captial court-martial to be tried under the current military death penalty system. (That figure counts Walker’s trial and retrial, as well as Dock’s trial and retrial, separately — as they should be, since they were two separate capital trials.) Fifteen of those cases resulted in death sentences, for a 30% death sentencing rate.
Eight military death sentences have been set aside on appeal (another two were set aside by convening authorities). Two of the eight cases set aside on appeal (Murphy and Quintanilla) remain pending at the trial level. In the remaining six cases, every death sentence was replaced by confinement for life. Only two of the cases — Dock and Walker — were retried capitally.
For comparison purposes, a study of civilian death penalty cases imposed from 1973-1995 found that 18% of reversed death sentences resulted in reimposition of death upon retrial. (7% of the civilian cases resulted in acquittal on retrial.)