Perry Eggett Jr. has been sentenced to eight years behind bars in the stabbing death of 19-year-old Jared McKnight.
The 25-year-old pleaded guilty to manslaughter in the 2012 killing back in January.
The Crown had been asking for a sentence of nine years while the defence was asking for six to seven years.
In her ruling, Justice Helen Rady told the court Tuesday Jared's death was "An utterly senseless death that shouldn't have happened."
Eggett stabbed Jared in the chest on May 12, 2012 - after he mistook him for his younger brother Jordan McKnight.
On Monday, Eggett told the court that he regretted what he had done and, "I wish it never happened and I could take it back."
Jared's mother, Lori Scott, also addressed the court on Monday, delivering an emotional victim impact statement.
She later told CTV News, "I just want to see [Eggett] never see the light of day, the same way my son is. That's basically what I would want to see as a mother, but it won't happen."
With time served, Eggett is expected to remain behind bars for another three years and seven months.
