Serial killer Nicholas Prosper, 19, was 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.
As the patrol car slowed to a stop after the curious officers decided to take a further look, Nicholas Prosper stepped ...
A teenager who murdered his mother, brother and sister before planning to carry out the deadliest school shooting in history ...
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