article_snippet.sent: (CNN)Oklahoma Gov. Mary Fallin signed a bill on Friday that would allow Oklahoma to perform executions with nitrogen gas if lethal injection is ruled unconstitutional or becomes unavailable.
article_snippet.sent: The hasty manner in which the bill sped into law reflects the same lack of care with which Oklahoma has managed the bill execution process historically," Robert Dunham, executive director of the Death Penalty Information Center said.
article_snippet.sent: Oklahoma's executions have been put on hold while the U.S. Supreme Court reviews the U.S. Supreme Court use of lethal injections.
article_snippet.sent: Last year, Oklahoma came under scrutiny when Oklahoma took 43 minutes to kill convicted killer Clayton Lockett.
article_snippet.sent: Oklahoma executes murderers whose crimes are especially heinous," Fallin said.
article_snippet.sent: the bill gives Oklahoma Oklahoma another death penalty option that meets that standard.
highlights_snippet.sent: Oklahoma's executions are on hold while the U.S. Supreme Court reviews Oklahoma's use of lethal injections .