Colorado movie gunman James Holmes assaulted by fellow prisoner

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James Holmes Spared Death Penalty in Colorado Shooting

Convicted mass killer James Holmes, who is serving multiple life sentences for gunning down a dozen people at a movie theater in 2012, was assaulted by another inmate at a high-security Colorado prison, a corrections official said on Friday.

Holmes was not injured when he was attacked by 27-year-old Mark C. Daniels at the Colorado State Penitentiary in Canon City, said Adrienne Jacobson, spokeswoman for the Colorado Department of Corrections.

Daniels lunged at Holmes and "took some swings" at him as the two prisoners were being escorted by guards down a hallway inside the lockup on Oct. 8, she said.

A corrections officer who got in between the two inmates during the dust-up and was not injured, she said, adding that Daniels will be charged administratively with assaulting Holmes and the officer.

SEE ALSO: Judge formally sentences James Holmes to life in prison

Holmes, 27, was convicted in August of multiple counts of first-degree murder and attempted murder stemming from a July 2012 shooting rampage at a Denver-area multiplex that killed 12 moviegoers and wounded 70 others.

Prosecutors sought the death penalty for the California native, who had pleaded not guilty by reason of insanity, but jurors could not unanimously agree that he should be executed.

See photos from the high-profile trial:

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James Holmes 'Dark Knight' Colo. theater shooting trial, Aurora, Colorado
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Colorado movie gunman James Holmes assaulted by fellow prisoner
CENTENNIAL, CO - APRIL 27: Family members of Aurora Theater shooting victim Veronica Moser walk into the Arapahoe County Justice Center as opening arguments for the trial of Aurora Theater Shooting defendant James Holmes opened at the courthouse April 27, 2015 in Centennial, Colorado. Holmes faces multiple murder charges stemming from a mass shooting in July 2012 theater shooting that killed 12 people and wounded dozens of others. (Photo by Marc Piscotty/Getty Images)
CENTENNIAL, CO - APRIL 27: Members of the media film people walking into the Arapahoe County Justice Center as opening arguments for the trial of Aurora Theater Shooting defendant James Holmes opened at the courthouse April 27, 2015 in Centennial, Colorado. Holmes faces multiple murder charges stemming from a mass shooting in July 2012 theater shooting that killed 12 people and wounded dozens of others. (Photo by Marc Piscotty/Getty Images)
CENTENNIAL, CO - APRIL 27: Producers at Denver Post TV listen and take notes from the courtroom live feed of proceedings as opening arguments for the trial of Aurora Theater Shooting defendant James Holmes opened at the Arapahoe County Justice Center April 27, 2015 in Centennial, Colorado. Holmes faces multiple murder charges stemming from a mass shooting in July 2012 theater shooting that killed 12 people and wounded dozens of others. Holmes is seated at the very far left of the television screen. (Photo by Marc Piscotty/Getty Images)
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A judge sentenced Holmes to a dozen life sentences with no possibility of parole, plus a maximum 3,318 years for his conviction on attempted murder and explosive charges.

News about the prison assault was first reported by the Denver Post after Daniels sent a letter to the newspaper admitting to the attack, Jacobson said. Prison officials have not seen the letter, Jacobson said.

According to the department of corrections web site, Daniels has multiple felony convictions on his record. The Post reported that he is serving time for assault, menacing, smuggling contraband into prison and assaulting a prison guard.

Holmes was moved to the penitentiary in September, although corrections officials have said it is unclear where he will ultimately serve out the reminder of his life sentences because his high-profile makes him a security risk.

During an interview with a court-appointed psychiatrist that was videotaped and shown to jurors at the murder trial, Holmes said he could hear other prisoners at the jail where he was held calling him "a baby killer and stuff."

The youngest victim killed in the rampage was six-year-old Veronica Moser, who was shot four times by Holmes.

(Editing by Victoria Cavaliere)

Click through for chilling pages out of Holmes' notebook:

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