The Department of Corrections says that 32-year-old Matthew Massaro was killed on Saturday.
A department statement issued Sunday says suspects in the murder were removed from the facility.
No further details were released.
The Daily Record of Cañon City reports that Massaro was serving multiple sentences for fraud, assault, robbery and motor vehicle theft, among other convictions.
He had been in corrections since 2011 and had a parole eligibility date of March 2025.