Chilling moment killer teacher dances in front of pupils just months before murdering boyfriend & burying him in garden

THIS is the chilling moment a killer teacher dances in front of pupils only months before murdering her boyfriend and burying him in the garden.

Fiona Beal, 50, tied Nicholas Billingham, 42, to a b then murdered him at their Northampton home.

Fiona Beal stabbed her boyfriend to death by slitting his throat Twitter/@eastfield_acadA clip posted by the school showed her dancing in front of pupils[/caption] Twitter/@eastfield_acadOne image posted by the school showed Beal reading...