Fearing Texas was preparing to execute a potentially innocent man, state lawmakers tried an admittedly desperate long shot when they issued a subpoena ordering death row inmate Robert Roberson III to appear before a House committee four days after his scheduled lethal injection.

Texas state lawmakers subpoenaed Roberson to testify in a bid to block his execution in a case centered on “shaken baby syndrome” science that has since been refuted.

A judge granted a request to delay the execution of a man scheduled to become the first person in the U.S. put to death for a murder conviction tied to a diagnosis of shaken baby syndrome.