Nicholas Prosper, 19, pleaded guilty at Luton Crown Court to the murders of his mother, Juliana Falcon, 48, and his siblings, Giselle Prosper, 13, and Kyle Prosper, 16, in September last year in Luton. Police have now revealed that during their investigation they discovered Prosper had also planned to commit a shooting at St Josephs school, but was spotted behaving strangely and arrested before he could carry out his plans.
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