Go to the website for the prison that the inmate is located and do an inmate search. That should give release date and or parole date.
How Can I Find Out A Federal Inmate's Release Date?
Go to the website FBOP and go to inmate locator it will tell you
Check with www.bop.gov and select the Inmate Locater. Enter name or ID. This will give you the relase date and show current status. If the status is released, contact the BOP and ask where the inmate was released. Then contact the U.S.P.O., in that jurisdiction and inquire ablout the person on SR. For more visit us at www.FedCURE.org
The federal bureau of prisons has a web site you'll be able to find what you need for any state