The unanimous decision frees the state to reset Robert Roberson's execution date but suggests lawmakers may still be able to hear his testimony.

It is the latest twist in the political saga surrounding the Roberson case, which drew national attention and sparked fresh rifts within the Republican party.

The state’s highest civil court ruled that legislators can’t use subpoenas to block death row inmates’ executions, but suggested there’s still time for Roberson to testify before a Texas House panel.