A Texas man who this week could be the first person in the U.S. executed for a murder conviction tied to the diagnosis of shaken baby syndrome is awaiting a decision on his request for clemency from a state board.

HOUSTON — The Texas Board of Pardons and Paroles on Wednesday denied a request for clemency for Robert Roberson, who could be the first person in the U.S. executed for a murder conviction tied to the diagnosis of shaken baby syndrome.