Published: Apr 04, 2013 10:28 PM EDT
Updated: Apr 04, 2013 11:57 PM EDT

DENVER (AP) - Colorado Gov. John Hickenlooper says the state's corrections department will audit the records of all inmates to make sure they're serving appropriate sentences.
    
Hickenlooper's announcement Thursday comes after it was revealed that the only suspect in the killing of Colorado's corrections chief was accidentally released from prison four years early.
    
Evan Ebel also is suspected in the killing of a Denver-area pizza delivery man two days before Tom Clements was killed.
    
The National Institute of Corrections also will conduct a review of all of the department's parole operations.