'I was drunk and I made some very stupid decisions.'

Those were among the words Mark Lange wrote in a letter of apology to Bob Olson's family after turning himself in to the RCMP.

The letter was admitted as evidence Thursday in the second-degree murder trial of Lange and Dean Boucher in the 2004 death of Olson.

It was presented by Sgt. Bradley Wirachowsky during his testimony to Yukon Supreme Court Justice Leigh Gower and a 12-member jury.

In the letter read out loud by Wirachowsky, Lange addresses Olson's family, stating he knows he is likely the last person they want to hear from and he's feeling extremely sorry and guilty.

Lange notes he doesn't want the family to see him like he's a victim; that will be up to God and the courts to decide, he says.

While he didn't know Olson, he told the family he heard on the radio that Olson was a good man.

The letter was written on Dec. 30, 2004 after he had turned himself in earlier in the day.

An arrest warrant had been issued for Lange as the RCMP had continued to investigate Olson's death. Despite several searches for him, police were unable to locate him.

At around 9 a.m., Wirachowsky said front desk staff at the detachment came to his office and told him Lange was at the front.

When Wirachowsky came to the front and told him he was under arrest for second-degree murder, Lange responded by asking if that could be changed, noting police had only heard one side of the story.

Advised of his right to legal counsel, Lange contacted the territory's legal aid office. It wasn't until the evening that Wirachowsky interviewed Lange. He waited until preliminary autopsy results were available from Olson's body.

In that interview, Wirachowsky said, Lange told him he had been drinking at Olson's Caribou Hotel in Carcross on Dec. 23.

Boucher was there and decided he wanted a piece of artwork off the wall. When Olson told him he couldn't have it, Boucher kicked him in the side of the head and several blows followed, Lange told Wirachowsky.

When Lange attempted to help Olson, the hotelier scratched him and the fight continued with Lange involved.

'Mr. Lange described a football kick (by Boucher to Olson),' said Wirachowsky.

That's when Olson started making some 'funny noises'. Boucher dragged Olson to the back door. Then Boucher and Lange loaded Olson into the back of the truck and drove toward Whitehorse, Wirachowsky recalled from the interview.

Stopping on the Carcross Road, they realized Olson had died and made unsuccessful attempts to revive him with CPR.

When they got to Whitehorse, they dropped the body in the Wolf Creek subdivision and tried to drive away. However, the truck became stuck, so they walked to the Petro-Canada station in McCrae and caught a cab downtown, Wirachowsky said, recalling Lange's version of events.

Viewing photographs of Lange's face after he had turned himself in, Wirachowsky said the scars seemed consistent with someone having grabbed his face.

During the interview with police, Lange also agreed to go to the Caribou Hotel with the RCMP to re-enact what had happened, Wirachowsky said.

As they were driving there with another officer, they stopped at a Tim Hortons restaurant. While waiting for their coffee in the car, Lange told Wirachowsky he was going to be 'in a world of shó' for helping out the RCMP with the case.

Lange's recollection of the evening at the hotel during the re-enactment was essentially the same as what he had told Wirachowsky in his earlier statement.

He again told the RCMP of the 'football kick' Boucher delivered to Olson and the fight that had started over the artwork.

Lange's clothing was later seized from a Whitehorse residence.

Also recovered in April 2005 was a jacket which appeared to be the one Lange described as being left at the scene where they left Olson's body.

Days before Lange turned himself in, RCMP officers arrested Boucher in relation to the death.

Wirachowsky said it was on Dec. 27, 2004 that he was called at home about a possible homicide.

He went to the Whitehorse detachment, where he was briefed and learned that Boucher had come in and reported an accidental death. Boucher had been detained and kept in cells, said Wirachowsky.

An anonymous 911 call also came in shortly afterward reporting the person involved in an accidental death was Lange, who was at the Greyhound bus station.

Wirachowsky was also informed that Olson's truck had been found in Wolf Creek, but Olson himself was the subject of a missing person's report dating back to Dec. 24.

Wirachowsky was tasked with interviewing Boucher.

When Wirachowsky brought Boucher in to the interview room at the detachment, he said he reviewed Boucher's rights, including the right to counsel.

Initially, Boucher didn't want to call a lawyer, but changed his mind a few minutes later.

During the interview, Boucher told Wirachowsky he had been upstairs in the Caribou Hotel when a fight broke out in the bar.

Wirachowsky recalled Boucher told him after he came downstairs he could see Olson on the floor bleeding. Boucher said he put Olson in the recovery position and attempted CPR, unsuccessfully.

In a panic, they put Olson in a truck, drove to Whitehorse and dropped the body in the Wolf Creek subdivision.

Boucher provided drawings of where Olson's body had been dropped and the inside of the Caribou Hotel. He also agreed to accompany police in their search for the body, but had trouble remembering where it was when they reached the subdivision. It was apparent he was trying to remember.

Other officers eventually located the body and radioed the vehicle Boucher was in with Wirachowsky and another officer to let them know. They then drove to the site.

'Mr. Boucher became quite emotional in the back (of the car) and began crying,' said Wirachowsky.

When they returned to the detachment, Boucher told his version of events again, the details changing a little, said Wirachowsky.

This time, he told police he witnessed the fight, which appeared more as a wrestling match, between Olson and another man.

Olson's clothes, which he said were the ones he was wearing on Dec. 23, were seized.

The following day, he took Boucher to court and up to the Whitehorse Correctional Centre.

As the investigation continued, Boucher was ordered to provide a DNA sample while Lange also agreed to provide one, Wirachowsky told the court.

Earlier on Thursday, the court heard from Sgt. Allan Lane, who continued his testimony from Wednesday.

He told the court he took swab, fingerprint and footwear evidence from the Caribou Hotel.