Yukon territorial court has heard about the night a young man assaulted 17-year-old Brandy Vittrekwa and abandoned her on a trail, causing her death.

On Tuesday afternoon, Crown prosecutor David McWhinnie read an agreed statement of facts he and the defence counsel had signed.

He reminded the court the young man, who was 15 as of last December, had pleaded guilty to manslaughter.

“He admits he is responsible,” said McWhinnie.

After asking the defence whether his client understood what the plea meant, Judge Peter Chisholm found the man guilty of manslaughter.

Anything that could identify the young man can’t be published due to his age.

On the night of her death, he contacted Vittrekwa on Facebook, inviting her to drink at a friend’s place.

He, Vittrekwa and another friend drank alcohol and socialized for several hours that night.

He tried to kiss her twice, and she found the attempt comical, the prosecutor said.

Both young people were intoxicated when they left their friend’s house.

It’s not clear what her intended direction was, but the young man offered to walk with her.

They were last seen near Elijah Smith Elementary school walking toward Granger – away from where Vittrekwa’s body was found.

Her body was discovered on the walking trails of the McIntyre subdivision on Dec. 8, 2014.

There was considerable blood, the prosecutor said.

Her face was swollen and bruised. Drag marks were found, and blood stains were in those drag marks.

The sequence of events surrounding the assault is not clear, McWhinnie said.

Vittrekwa’s coat was also found by a resident, and had blood stains. It’s not clear how she became separated from it.

Cell phone records show all activity had stopped at around 1:45 a.m. that night.

The temperature was between zero and -3 C that night in Whitehorse.

The autopsy revealed blunt force trauma to Vittrekwa’s face and neck and a broken jaw.

There was no evidence of sexual assault.

The exact cause of death couldn’t be ascertained, as it was likely a combination of asphyxiation, intoxication and exposure that killed her.

On Dec. 8, 2014, the Monday following Vittrekwa’s death, the young man had swollen knuckles, the prosecutor said, according to what his mother told the police.

He came back early from school that day saying he was unwell.

Three days later, he was arrested but charged for other matters.

RCMP officers noted his right hand to be swollen at the time.

A search warrant executed on Dec. 12, 2014 yielded a hoodie and shoes, both with blood stains matching Vittrekwa’s DNA.

The man was re-arrested on April 28, 2015.

The following day, he was charged with the second-degree murder of Vittrekwa.

He pleaded guilty on Dec. 17, 2015 to the lesser included offence of manslaughter.

Vittrekwa was a Gwich’in citizen.

The man isn’t a Kwanlin Dün First Nation citizen.

The Crown had filed an application for the young man to receive an adult sentence, but that doesn’t mean he will necessarily go forward with it.

“However, we are required on an ongoing basis to review and reconsider whether we can or will still proceed with such an application,” McWhinnie told the Star today.

The final decision on whether to ask the judge to come down with an adult sentence will be made once several reports about the young man have been done, he said.

Defence lawyer David Tarnow told the court he wants his client to get a proper Gladue report – a report that looks at systematic issues surrounding an aboriginal person’s life to be considered during sentencing.

He noted there have been problems with getting such reports done in the territory.

A sentencing hearing has been scheduled for May 20.