He killed his best friend, detail in the cell that discovered everything (Photo)

A Canadian girl is sentenced for her friend's murder after police discovered the gun to the murder in a cell that had both made, ending the mystery since 2015.

Cheyenne Rose Antonie, 21, was found guilty of the murder of her friend Britney Gargogue, 18, and was sentenced to 7 years in prison. Garggol was found killed dead by a landfill in Saskatoon, Saskatchewan, with Antoine's belt.

She was identified as a suspect after posting a Facebook cell, where she reportedly wore the same belt Gargole was killed. Antoine, who was originally charged with second degree murder, had confessed to a friend that she had hit Brittney and that she had later shot him with a belt. Before the court she said they were drunk and consumed marijuana.

I will never forgive myself, the things I can say won't bring him back, I'm very sorry... It should not have happened”, she said in a statement through her lawyer. And her lawyer said the girl had suffered years of child abuse from foster parents.