William Morva's lawyers, Virginia state legislators, U.N. experts and even a daughter of one of his victims called for his execution to be stopped. Virginia Department of Corrections/AP hide caption

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Virginia Department of Corrections/AP

In March, State Attorney Aramis Ayala announced she wouldn't seek the death penalty in murder cases. Red Huber/Orlando Sentinel/TNS via Getty Images hide caption

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Red Huber/Orlando Sentinel/TNS via Getty Images

Arkansas wrapped up an aggressive execution schedule Thursday, putting to death its fourth inmate in eight days. Kenneth Williams, 38, received a lethal injection Thursday night at the Cummins Unit prison at Varner, Ark. Arkansas Department of Correction/AP hide caption

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Arkansas Department of Correction/AP

The Supreme Court justices took up a death penalty case on Monday, looking at an inmate's right to help from a mental health expert. Win McNamee/Getty Images hide caption

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Win McNamee/Getty Images

Justices Split Over Defendants' Right To Mental Health Expert Witnesses

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James Edmund McWilliams Jr. was sentenced to death in 1986 for the rape and murder of a convenience store clerk during a robbery. Alabama Dept. of Corrections hide caption

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Alabama Dept. of Corrections

Supreme Court To Decide If Prosecution, Defense Can Share Experts in Capital Case

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While facing a number of issues surrounding lethal injection as a execution method, some states like Mississippi are creating back-up plans of alternative methods. These methods include using a gas chamber, an electric chair or a firing squad to carry out executions. Nevada Department of Corrections via AP hide caption

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Nevada Department of Corrections via AP

States Find Other Execution Methods After Difficulties With Lethal Injection

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Orange County State Attorney Aramis Ayala announced last month that she would no longer seek the death penalty in Orange and Osceola counties. On Monday, Florida Gov. Rick Scott reassigned 22 murder cases from Ayala. Orlando Sentinel/TNS via Getty Images hide caption

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Orlando Sentinel/TNS via Getty Images

This combination of undated photos provided by the Arkansas Department of Correction shows death row inmates slated to die in April. Top row (from left): Jack Harold Jones Jr., Marcel Williams, Stacey E. Johnson, Ledell Lee. Bottom row (from left): Jason F. McGehee, Kenneth Williams, Don Davis and Bruce Earl Ward. Arkansas Department of Correction via AP hide caption

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Arkansas Department of Correction via AP

Supreme Court Rejects Texas Standard For Mental Disability In Capital Cases

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Orange-Osceola State Attorney Aramis Ayala speaks with reporters about her decision to not pursue the death penalty during her administration. Renata Sago/WMFE hide caption

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Renata Sago/WMFE

Florida Gov. Removes State Attorney From Death Penalty Case

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Death row inmate Duane Buck, seen here in an undated photo provided by the Texas Department of Criminal Justice, won his request for an appeal of his death sentence. Texas Department of Criminal Justice via AP hide caption

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Texas Department of Criminal Justice via AP

The death chamber at the Southern Ohio Corrections Facility in Lucasville, Ohio, as seen in 2005. A federal judge has rejected the state's lethal injection drug protocol, postponing three upcoming executions. Kiichiro Sato/AP hide caption

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Kiichiro Sato/AP

Gray was convicted of murdering an entire family in 2006 and given the death penalty for killing the children. His execution would be the first known instance of any state using a dose of the sedative midazolam that was procured from a compounding pharmacy. Virginia Department of Corrections via AP hide caption

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Virginia Department of Corrections via AP