The young woman facing a first-degree murder charge in a Brentwood stabbing death says she didn't mean to do it.

University of Calgary student Brett Wiese bled to death in January 2013 while waiting for a taxi after a friend's party in the northwest.

The 20-year-old was swarmed by a number of people and stabbed several times.

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Brett Wiese was a business student at the University of Calgary when he died in January 2013. (Courtesy of the Wiese family)

The woman and a group of friends who showed up uninvited had been asked to leave the party earlier that night. The woman is alleged to have refused to go, and was screaming, swearing and swinging at partygoers. She vowed to return.

“It wasn’t something I was going to follow through on. I was trying to make myself look bigger,” testified the woman, who can’t be named under the Youth Criminal Justice Act because she was 17 at the time of the incident.

“I didn’t mean it.”

It is alleged the woman spent the next few hours after the party gathering a group of friends to go back and confront a man who she had fought with.

Prosecutor Carla MacPhail said earlier this week the Crown's theory is that the woman meant to confront a different man named Brett.

The girl admitted to stabbing someone at the party but doesn’t admit to planning the attack.

She also said she was drunk — both factors that could affect the first-degree murder conviction.  

2nd person facing charges

Mitchell Harkes, who was with the group that returned with the girl, faces second-degree murder charges.

The young woman also faces three assault charges for injuries sustained by other party-goers.

The final witness is scheduled to testify Monday.

After that the Crown and defence will make their final arguments before the case is decided by a judge.