He's a governor, not a king, and is constrained by the rule of law. They've already tried to be creative with the subpoena(perhaps overstepping their bounds), which reeks of desparation, though that aspect may not be over.
Creativity is the key, but with all the facts in the case he and the GOP legislature in Florida have not been nearly creative enough. If it were a Bush daughter being killed I bet the creativity would increase exponentially.