CENTENNIAL. Colo. (AP) — A state committee that handles victims’ rights issues is planning to take up complaints against the state corrections department that the agency violated their rights by refusing to reveal where gunman James Holmes is serving his life sentence.

Several survivors of the 2012 attack that killed 12 and injured 70 have said they are upset after prison officials quietly transferred Holmes to an out-of-state prison in January after he was attacked by another inmate. State officials have repeatedly refused to tell the public where or how he is being held.

READ MORE: City Park Jazz Announces Its 2021 Summer Lineup

The panel could require prison officials to provide details of Holmes’ confinement to victims, but it’s unclear whether they would be forced to comply.

READ MORE: New Law Would Help Ensure Domestic Violence Offenders Turn Over Their Guns

The committee also could propose ways the department can keep victims better informed in the future.

MORE NEWS: Tax Refund Delays Grow As Filing Deadline Gets Closer

(© Copyright 2016 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.)