Shannon Johnson
Shannon Johnson was executed by the state of Delaware in 2012. According to the Death Penalty Information Center, questions about his mental competence were never reviewed by any court. Federal Judge Gregory Sleet twice stayed the execution over concerns about the state's competency proceedings, but the Third Circuit lifted those stays. Judge Sleet later said that the process in his case, and in the death penalty system more broadly, was broken.
Cause of death, as reported: Executed by the state. Federal Judge Gregory Sleet stayed the execution twice over concerns about the state's competency proceedings, and later said the process in this case and the wider death penalty system was broken.
Reported by: State of Delaware (the agency that held him). The only account of how this person died comes from the agency that held him.