A Colorado court apologized for a clerical error that resulted in the release from prison of Evan Ebel four years too soon and said it would review its practices to avoid another mistake, reports the Denver Post. Authorities have tied Ebel, 28, to the slaying of state prisons chief Tom Clements at his home and the killing two days earlier of a pizza-delivery driver. The driver’s widow said, “This was something that could have been prevented. My husband would still be here today. The father of my children would still be here today. Tom Clements would still be here today.” The mistake allowed Ebel to be released from prison Jan. 28 without serving any additional time for a 2008 conviction for assaulting a prison guard, despite the terms of a plea agreement. Judge David Thorson announced the sentence but did not specify that it was to be served consecutively. That led to prison officials imposing a sentence that was concurrent, meaning Ebel served no additional time for the conviction.