Jail or prison. Jails you can call the inmate information line and see if they have been released. Prisons the inmate has tot ell you or call inmate locator and they will tel you they have been paroled.
Are they in jail or prison? If they are in jail you can try the Sheriff's link for the county they are in, it usually will list the information like their court date or release date. If they are in prison, I am not sure how you can find out if they have been released.