Shayna Hubers, Killer

Shayna Hubers was sentenced to life in prison for the murder of her boyfriend Ryan Poston. A beautiful but jealous young woman, she became enraged when her boyfriend stated that he wanted to leave her so he could date another woman.
But Hubers claimed self-defense as she stated that Poston pressured her to perform sex acts and was abusive. What really happened in their relationship? Was Shayne wrongfully charged or was she a cool, calculating killer?