Daryl Holton(November 23, 1961  September 12, 2007)  had a trial June 1999 and witnesses say he showed signs of carbon monoxide poisoning and that he had major depressive disorder
Daryl Keith Holton (November 23, 1961  September 12, 2007) was an American Gulf War veteran and convicted child murderer who was executed by electrocution by the state of Tennessee on September 12, 2007, in Riverbend Maximum Security Institution in Nashville. At his June 1999 trial, Holton declined to testify on his own behalf, although his attorney sought to convince the jury that Holton was mentally incompetent at the time of the killings. Witnesses for the defense testified that Holton showed signs of carbon monoxide poisoning, although they could not definitively conclude that he had been exposed to carbon monoxide. Psychiatrists for the state and the defense also testified that Holton had major depressive disorder and passive-aggressive personality disorder at the time of the murders. 
