Justice Carl Thompson will decide on March 20 how long Steven Neville will stay behind bars.
Neville was convicted of second-degree murder and attempted murder in the death of Doug Flynn and attempted murder of Ryan Dwyer in October 2010 in Paradise.
It's a life sentence, but the issue of parole eligibility was argued in Newfoundland Supreme Court today.
Crown prosecutor Robin Fowler said Neville should not be eligible for parole for 15 years, given the seriousness of the offence and the impact on the family.
Fowler said the jury rejected the self-defence claim. He said Neville was motivated by anger.
Defence lawyer Peter Ralph said 15 years is excessive. He said 10 years is more appropriate.
He said Neville is a youthful offender with cognitive disabilities which affect his judgment. He said he had a supportive family and has taken steps to improve his life, which bode well for his prospects for rehabilitation.