The father of a man murdered over a decade ago uttered an audible sigh of relief outside a Calgary courtroom on Friday after&nbsp;hearing his son's killer was found guilty.

"It's over," said Allan Berdahl&nbsp;Sr. "We haven't been able to talk about this in 10 years."

In 2007, the body of Allan&nbsp;Berdahl&nbsp;Jr. was found in a roadside ditch east of Carstairs. He had been shot five times in the head.

It took RCMP&nbsp;eight years to make an arrest in the case, but in 2015, the victim's friend Russell Tessier&nbsp;was charged with the crime.

Calgary man arrested 8 years after Allan Berdahl's killing

A charge of first-degree murder has been laid in a southern Alberta homicide case that dates back more than eight years.

Grande Prairie RCMP believe the latest attempt to steal an ATM is connected to three other incidents in the city during December.   

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Calgary trial begins more than a decade after accused's friend was shot dead

The first-degree murder trial of Russell Tessier began Monday — more than a decade after he allegedly shot Allan Berdahl five times in the head and left his body on the side of the road.

Calgary 6155 court courts provincial queens bench legal justice courthouse alberta

The first-degree murder trial of Russell Tessier, accused in the 2007 shooting death of Allan Berdahl, is set to last three weeks. 

After a three-week trial, the jury found Tessier guilty of first-degree murder on Friday, which carries an automatic life sentence with no chance of parole fo 25 years.

During the trial, the jury heard how Tessier was the last person to see Berdahl&nbsp;alive and that the two had fought over a shared vehicle.&nbsp;

The Crown presented evidence that included video surveillance, phone records and a cigarette butt found near Berdahl's body that had Tessier's DNA on it.&nbsp;

Defence lawyer Rebecca Snukal&nbsp;had questioned the DNA evidence from the cigarette butt in her closing arguments, saying it could have been transferred from another item and that it was found almost a kilometre away from the body.&nbsp;

She also said Berdahl&nbsp;had a lot of enemies and owed a lot of money, suggesting there were a number of people who could be suspected in his death.&nbsp;

In his victim impact statement,&nbsp;Berdahl&nbsp;Sr., talked about how his son was characterized as a liar and a con man.

"I ask, who is the con and the liar?" he wrote.

Berdahl&nbsp;Sr.&nbsp;broke down in court as the Crown read his victim impact statement, in which he spoke about the son they called Gerry, He said Gerry was excited about moving to Winnipeg to start over but Tessier robbed him of the chance to see his son turn his life around.

"I hope you&nbsp;rot in hell for what you have done," he wrote to his son's killer.

Outside the courtroom, Crown prosecutor Jillian Pawlow&nbsp;said it was clear it was not an easy decision for the jury to make, but she believes they made the right one.

"I think the jury certainly took their time in looking over what was available to them," she said. "I think that's an indication that they took their job as a jury extremely seriously."

Allan Berdahl Sr., pictured at the Calgary courthouse with his wife Janet, said he was elated after the jury found his son's killer guilty of first-degree murder over a decade after the crime.

'It's over': Family of man found dead 11 years ago relieved after jury finds killer guilty

'Who is the con?'

Jury took job seriously

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