Petitioner, a criminal sexual psychopathic person, seeks a writ of mandamus directing defendant to hear his petition which was denied as insufficient.

*756In Re Rowan, 305 Mich. 231, we said:

“We interpret the provision (Act No. 165, § 7, Pub. Acts 1939 [Comp. Laws Supp. 1940, § 6991-7, Stat. Ann. 1943 Cum. Supp. § 28.967 (7)]) to he mandatory in this respect if jury trial is demanded by the petitioner within the time limited therein.”

To this we add: The statute requires that the petition must show a factual basis for the claim of full recovery.

Such showing not having been made, the writ of mandamus is denied.