Texas lawmakers exceeded their power when they intervened last month to stop the execution of Robert Roberson by summoning him to testify, the court found.

The Texas Supreme Court ruled that a legislative subpoena cannot be used to stop an execution, putting a decisive end to a legal battle that halted the scheduled execution of Robert Roberson last month.

The Texas Supreme Court on Friday said the state could set a new execution date for a man convicted of murdering his toddler on evidence of "shaken baby syndrome," ruling that a legislative committee exceeded its authority in delaying the sentence.