Teen killer Melissa Todorovic will be back before the Parole Board of Canada on Friday for yet another bid at more freedom.

Inflicting yet another piercing blow to the family of the girl she killed.

Todorovic, now 33, was the high school mastermind behind the 2008 slaying of 14-year-old Stefanie Rengel.

Just 15 herself at the time, she was relentless in her jealous and obsessive demands to have her boyfriend David Bagshaw murder the girl he’d briefly – and platonically – dated two years before. A girl she’d never even met.

After an eight-month barrage of phone calls, 50,000 MSN messages and thousands of texts laced with sexual blackmail – “no sex til then lol” – her lovesick boyfriend finally gave in . On New Year’s Day in 2008, days shy of his 18th birthday, Bagshaw lured Stefan

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