Shang Aiyun (second left) and Li Sanren (second right) mourn at the grave of their son, Huugjilt, in Hohhot, China. Huugjilt was executed in 1996 for the rape and murder of a woman in a public toilet. He was cleared of the crime on Monday. Ren Junchuan/Xinhua /Landov hide caption

itoggle caption Ren Junchuan/Xinhua /Landov

This undated file photo provided by the Arizona Department of Corrections shows inmate Joseph Rudolph Wood. No one on the Supreme Court objected publicly when the justices voted to let Arizona proceed with the execution of Wood, who unsuccessfully sought information about the drugs that would be used to kill him. AP hide caption

itoggle caption AP

A Texas judge halted the planned execution of Robert Campbell, saying his lawyers could not fairly prepare an ineligibility claim because the state had not provided them with relevant information. Campbell is mentally disabled. Texas Dept. of Criminal Justice/AP hide caption

itoggle caption Texas Dept. of Criminal Justice/AP