LIVINGSTON, Texas (AP) — Robert Roberson was calm and hopeful as he pondered his mortality and whether he could again avoid becoming the first person in the U.S. executed for a murder conviction tied to the diagnosis of shaken baby syndrome.

With days to go before his scheduled , Roberson maintained his innocence in the 2002 death of his 2-year-old daughter, Nikki Curtis, in the east Texas city of Palestine. He is set to die by lethal injection nearly a year to the day after a group of Texas lawmakers, who say he is innocent, secured an extraordinary last-minute postponement as Roberson waited outside the death chamber in Huntsville.

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