How did a quiet and studious teenager turn into a murderer fixated on becoming history’s most notorious killer? ITV News Anglia Reporter Katie Ridley explains.
Nicholas Prosper, 19, has been jailed for a minimum of 49 years after he murdered his family and then planned to stage the deadliest school shooting in history.
The teenage triple killer illegally bought a shotgun and ammunition the day before shooting dead his mother, brother and sister at their home in Luton.
Two hours later he was arrested by passing officers who saw him behaving strangely and found him spattered with blood, and Prosper then led him to where he had stashed a shotgun and 33 cartridges.
Plans later found by police – described by investigators as "credible" – showed that he intended to go to his former school to kill 30 children, two teachers and himself, which would have become the deadliest ever school shooting.
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