03/21/2012 11:15 EDT | Updated 05/21/2012 05:12 EDT

Mississauga teen homicide trial sees police video

One of the two people accused in the stabbing death of a 13-year-old Mississauga girl was shown in a recorded police interview on Wednesday sobbing uncontrollably and sometimes banging her head on the table as she recounted her version of events.

Michelle Liard and her former boyfriend, Rafal LaSota, both of Mississauga, have pleaded not guilty to first-degree murder in the death of Aleksandra Firgan-Hewie.

Police say Firgan-Hewie was stabbed 37 times and left in garbage bags outside LaSota's house.

Liard appeared in the witness box of the Brampton courtroom for the second straight day, but mostly the jury watched hours of video of a police interview.

Echoing her testimony from Tuesday, Liard tells the police officer on the recording that LaSota acted alone, killing Firgan-Hewie in his room while she was outside having a cigarette.

"Rafal got the door blocked," she said in the video. "I got it open enough to see blood. Rafal is all covered in blood. He's so fu--king stupid, stupid idiot."

The jury heard how Liard helped LaSota clean up by washing his blood-stained clothes.

"I just wanna say that I had to protect him," she said. "I was too fu--ing frazzled…He just fu--ing snapped."

When a police officer asked her if she wanted a laywer, she said, "Either way, I'm f--cked."

Firgan-Hewie is remembered by her family as a bright, bubbly 13-year-old who just wanted to fit in.

CBC reporter Natalie Kalata said Firgan-Hewie's mother would not speak on camera on Wednesday, but it was clear in court that she was distraught as she watched the graphic, first-hand account of her daughter's slaying.

The trial resumes on Thursday.