State police said they received word on October 25 from officials at the state’s high-security Garner Correctional Institution at 50 Nunnawauk Road explaining that a correction officer had been assaulted by an inmate.

State police responded to the prison to investigate and then charged inmate Adal Osorio, 32, with assault on a peace officer and with failure to submit to fingerprinting. State police allege that Osorio threw a cup of urine at a 29-year-old male correction officer.

Osorio pleaded not guilty to both charges at his October 26 arraignment in Danbury Superior Court. He is scheduled to return to court on November 9.

Osorio is serving a six-and-one-half year sentence in Garner on a conviction for violation of probation.