A man who knocked a prison officer unconscious earlier this year has had six months added to his sentence.
Herbert Marsden, 33, was approaching the end of a five and a-half year prison term when he punched the 50-year-old officer in retaliation for disciplinary charges three days earlier, the Dunedin District Court heard yesterday.
After the unprovoked one-punch attack, Marsden stood over the then unconscious officer and said "That's what you get for charging me", before waiting to be returned to his cell.
The officer laid the internal prison charges of inciting on April 29 because Marsden had been encouraging two other inmates who had barricaded themselves in their cell to continue disrupting and damaging the unit, the summary from Crown counsel Richard Smith said.
The defendant was released from his cell about 8am on May 2 by the victim and two other officers. He walked out and was subjected to a "rubdown search".