Credits: CARMINE MARINELLI/QMI AGENCY
In 2010, Dustin Moir, 27, was convicted of murdering Acorn, who was 14 years old when she went missing from an Abbotsford, B.C., group home.
His father, Jesse Blue West, 60, claimed he only buried the girl's body to help cover up the crime.
But a B.C. Supreme Court judge didn't buy West's story and convicted him of first-degree murder, meaning life in prison with no parole eligibility for 25 years.
Acorn went missing in 2005 and her body was found by hikers near Hope, B.C., the following year.
The integrated homicide investigation team, which took over the case, on Monday issued a statement recognizing the impact of the conviction.
"Today marks the closing of a very painful chapter for the family and friends of Chelsey," Sgt. Jennifer Pound said.
"To see justice brought to those responsible for this grisly murder is a successful ending to a lengthy investigation."