Police have charged a girl under the age of 18 in the death of Sierra Chalifoux-Thompson over the weekend.

Chalifoux-Thompson died in hospital after she was assaulted around 11 p.m. on Friday in the area of 75 Street and Mount Lawn Road NW.

The girl, whose age has not been released, has been charged with second-degree murder. Under the Youth Criminal Justice Act, her identity cannot be released.

Police held a press conference on Monday afternoon, but were not able to provide much additional information.

They did confirm that the girls were known to each other.

“It wasn’t a close relationship but through mutual associates we can confirm they knew each other,” S/Sgt. Brenda Dalziel said Monday.

She also confirmed that they have received a lot of tips from the public about the case, but it was other evidence that led to the arrest of their suspect. 

A vigil was held on Sunday night for Chalifoux-Thompson.

“Sierra she was a great kid, she had so much love for everybody, and she was always worried about her siblings,” her mom Angela Chalifoux said. “She acted more like a mother to them than a sister.”

“She had a whole life ahead of her still,” her stepdad Jessie McDonald said.

An autopsy has been scheduled for Thursday.