Whether state prison officials violate an inmate's due process and jury trial rights when they hold an inmate in custody pursuant to an additional consecutive sentence imposed not as a result of the underlying conviction but pursuant to a separate statute which, under the terms of that statute, does not create a separate offense?

QUESTION PRESENTED Whether state prison officials violate an inmate’s due process and jury trial rights when they hold an inmate in custody pursuant to an additional consecutive sentence imposed not as a result of the underlying conviction but pursuant to a separate statute which, under the terms of that statute, does not create a separate offense? i