R. Kelly is held in special housing in North Carolina as officials probe his contact with a former prison official. A former warden explains what happens next.

Kelly is being held in isolation for 'possession of a phone number of a retired prison official,' according to his attorney, Beau Brindley Michael Tercha/Chicago Tribune/Tribune News Service via Getty ...

R. Kelly is under investigation for possessing the phone number of a retired prison official at his federal lockup in Butner, N.C., and has been placed in isolation for the duration of the probe.