Axe murderer Marcus Rappel is facing more time behind bars after punching a prison guard in an incident captured by CCTV cameras.
Rappel, 45, was sentenced in 2017 to 32 years and two months in jail for brutally killing his former partner Tara Costigan with an axe as she cradled their week-old baby in her arms.
Last year, he was sentenced to a further six years for an attack on two brothers in Canberra's jail, the Alexander Maconochie Centre.
Rappel, who is not eligible for parole until 2044, is now due to be sentenced for another prison assault.
Documents tendered to the ACT Magistrates Court said that on June 23, 2018, Rappel's forehead was cut during "a physical altercation" at the Alexander Maconochie Centre.
While a nurse was treating the injury, Rappel verbally abused guards and demanded a coffee.
He became agitated and asked "Do I have to get it my f---ing self?", before walking to a kitchen bench whilst holding a bloodied bandage over the cut.
He started making a coffee, but was told by a guard that he needed to wait until after he had received treatment.
Rappel responded by lunging at the guard and punching him with his right fist, which was also holding the bloodied bandage.
The punch knocked the guard off balance and caused him instant pain, but no lasting injury. The guard also ended up with Rappel's blood on his face.
Rappel continued to lunge at the guard, who raised his hands to cover his face as fellow guards restrained and handcuffed Rappel.
Court documents said police obtained CCTV footage of the incident, and that Rappel told officers he did not want to talk to them about it.
Rappel, who has since been transferred to the notorious Goulburn Supermax prison, was due to be sentenced on Wednesday for the assault.
But Magistrate James Stewart accepted a request from Rappel's lawyer, Peter Bevan, for an adjournment.
The case is scheduled to return to court on April 1.