Rozen, 38, was a lawyer who had given up his practice to work with troubled kids. In January of 2004, he placed a classified ad in a local paper to sell his ex-fiance's $18,000 diamond engagement ring.
The man who answered that ad shot Rozen to death inside his West End apartment.
The case was considered unsolved for years, until an Abbotsford police officer saw a sketch of the murderer, and thought it looked like UN gang member Michael Bruce Newman.
Newman, 43, repeatedly denied his role in the killing, but was found guilty of first-degree murder in Vancouver's B.C. Supreme Court Wednesday.
The judge said Newman was guilty of first-degree murder, rather than a lesser charge, because of the "particularly sadistic" nature of the crime.
Court documents said Newman confined Rozen in his Haro Street apartment, stabbed him 62 times and shot him "execution style."
At Thursday's sentencing hearing, Newman once again denied his role in the murder.
After hearing victim impact statements from Rozen's father, mother and sister, the judge announced Newman's sentence would be life in prison, with no eligibility for parole for 25 years.
Rozen's father, Jack told CBC News he's relieved the trial is finally over, and he can stop focusing his attention on his son's killer.
"At the beginning, nine years ago... I was extremely angry. I could hardly wait to have this man caught. I had these horrible thoughts about this man," Rozen said.
"But the reality was that slowly, as time wore on, we started realizing that he, [Newman], was really not important anymore in our lives. I know that Marc, our son, would not have wanted us to spend the rest of our lives being angry.
"We had a son for 38 years, and that's what I think is going to carry us for the rest of our lives."