A Saskatchewan man convicted of killing his daughter's drug-addicted boyfriend apologized for the crime in court, but the victim's family rejected his apology.

Kim Walker was found guilty of manslaughter Thursday for killing 24-year-old James Hayward. It's was the second time Walker has stood trial for Hayward's death.

A sentencing hearing on Friday included a victim impact statement from Hayward's brother, Dan.

"You will never fully understand what you have done and I will never forgive you for it," the statement said.

Hayward was "a 24-year-old man with problems, someone that made mistakes, just as many other people do in life," his brother said. "He never got the chance to straighten his life out because Kim Walker stole that chance from him."

Justice Ellen Gunn said she will decide on Walker's sentence July 13.

The court heard that Walker's then-15-year-old daughter Jadah had become addicted to morphine under the influence of Hayward, and that Walker had received death threats from the boyfriend.

In March 2003, Walker had obtained a warrant that committed Jadah to hospital for 72 hours of addiction treatment, but she was living with Hayward.

Walker brought a 9-millimetre pistol to Hayward's home. According to Walker's lawyer, it was for protection.

The court heard that Walker fired 10 shots at Hayward, hitting him five times. Hayward, who was unarmed, bled to death.

Walker was initially convicted of second-degree murder in 2007, with the jury recommending he be eligible for parole after 11 years -- the most lenient possible sentence.

But that conviction was appealed and successfully overturned last summer, because the trial judge, Justice Jennifer Pritchard, had met with Crown and defence lawyers at the same time, off the record, without Walker present.

With files from The Canadian Press