State prison officials say they will not take additional security measures to protect James Holmes after his recent assault at the Colorado State Penitentiary.

Mark “Slim” Daniels, 27, assaulted Holmes on Oct. 8 as the two inmates crossed paths inside the state’s highest security prison. Holmes was not injured.

The Colorado Department of Corrections is not reviewing its security procedures following the attack, believing that current security measures are adequate, prison spokeswoman Adrienne Jacobson said Monday.

Holmes is serving life in prison at the state’s highest security prison in Cañon City for killing 12 people and injuring 70 others.

He is being held alone in a Management Control Unit, Jacobson said. Although the pod has numerous other cells and beds, Holmes is the only offender occupying the pod.

Although the state holds the most dangerous offenders in Colorado in administrative segregation cells 23 hours a day, the offenders are occasionally moved through the prison for medical reasons, hair cuts or other reasons and occasionally inmates cross paths with each other in the halls, Jacobson said.

The Denver Post learned of the assault when it received a letter from Daniels on Friday.

Daniels’ father, Tim Daniels of Gettysburg, Pa., said he believes the CDOC tried to prevent his son from telling anyone about the assault and he believes that violated his son’s rights.

Tim Daniels said his son wrote the letter to the newspaper — forged with the name of another CSP inmate — to let people know he had assaulted Holmes.

“He wanted to get this out,” Tim Daniels said.

He said every time his son called him and started telling him about his assault of Holmes, prison staff would disconnect the phone call.

Jacobson said the CDOC does have an interest in not disclosing such attacks as part of its security strategy. Notoriety for such acts can fuel other attacks, she said.

The CDOC confirmed last week that Daniels lunged at Holmes and took swings at him while the two were passing in a hallway.

Mark Daniels is eligible for release in November 2016. His mandatory release is in the summer of 2018. He faces in-house prison penalties for assaulting Holmes and a correctional officer that could extend his prison time.

Kirk Mitchell: 303-954-1206, kmitchell@denverpost.com or @kirkmitchell or denverpost.com/coldcases