Evil teen gunman Nicholas Prosper has been jailed for 49 years for murdering his family and trying to slaughter 30 children in a failed school shooting plot. Prosper had been on a bloodthirsty mission to commit the 'biggest massacre in the 21st century' after exploiting a terrifying loophole in gun laws to buy a shotgun and 100 cartridges. The calculated school dropout launched his rampage on September 13 last year, blasting his mother, Juliana Falcon, 48, and siblings Kyle Prosper, 16, and Giselle Prosper, 13, in the head at their Luton home before setting off for the school intending to 'kill all'. #nicholasprosper #crime #ukcrime #shooting #shocking #sentenced #sentencing