An 18-year-old woman has been found guilty of second-degree murder in the stabbing death of a University of Calgary student.

Brett Wiese, 20, bled to death in January 2013 after being attacked at a house party in the city's northwest.

The teen, who was originally charged with first-degree murder, was also convicted in a Calgary courtroom today on two counts of assault and one count of aggravated assault for injuries sustained by other party-goers.

One of the others assaulted at the home lost 28 per cent of his lung capacity, has heart problems and has scars on his face.

The woman, who cannot be named under the Youth Criminal Justice Act because she was 17 at the time of the incident, wiped away tears as the judge read the verdict. Her father buried his face in his hands.

Friends and family of Wiese filled the courtroom, many sporting pins with the man's face on them.

His family said they were hoping the woman would be found guilty of first-degree murder instead of second.

'I didn’t mean it'

In earlier testimony, the accused admitted to being kicked out of the Brentwood party by someone and returning later to confront a different person.

She had shown up with friends to the party uninvited and had been asked to leave earlier that night. The court was told that the woman refused to go, and was screaming, swearing and swinging at party-goers before vowing to return.

“It wasn’t something I was going to follow through on. I was trying to make myself look bigger,” the woman testified during the trial.

“I didn’t mean it.”

Justice Charlene Anderson dismissed much of the testimony of the accused because she said it conflicted with the testimony of others and because she said it defied common sense and reason.

The Crown has applied to have the woman, who is now 18, sentenced as an adult. She is now undergoing a psychiatric assessment.

At least 25 victim impact statements have been submitted ahead of the sentencing hearing which will likely be in the fall.

Her co-accused, Mitchell Harkes, faces a second-degree murder charge. His trial is set for Sept. 8.

With files from Kyle Bakx/CBC