A teenager obsessed with the Columbine High School shooting and planned a similar massacre in Britain has been jailed for 16 years.
Kyle Davies, 19, was caught after ordering a gun and ammunition from the dark web to carry out the mass execution he spent months researching.
The teenager, who has been diagnosed with autism and depression, ordered the Glock 17 handgun and five rounds from an online gun dealer to his family home in Gloucester.
But Homeland Security officers stopped the order at Newark Airport in New York and alerted police, who arrested Davies after delivering a dummy package to his home.
When police searched his bedroom they found a USB stick with more than 1,000 pages relating to explosives and massacres.
Officers found two notes listing items needed for the shooting such as a gas mask, trench coat, gloves, boots, body armour and a leg pistol holder as well as ingredients for explosives.
After a two-week trial at Gloucester Crown Court in July, Davies was convicted of attempting to possess a firearm and ammunition to endanger life.
On Friday at Taunton Crown Court he was jailed for 16 years and must serve an additional three years on licence.
Detective Inspector Kevin Till said after the sentence that he believed a ‘potential mass casualty incident’ had been prevented.
He said: ‘It quickly became apparent that he was a very dangerous individual who not only idolised mass shooters, but had begun his own preparations to follow in their footsteps.’
Judge Paul Cook said the ‘disturbing’ material at Davies’ home showed ‘extensive research’ and an ‘interest in mass murders’.
The court heard Davies had researched ‘in detail’ the Columbine High School shootings in Colorado, US, in 1999, during which students Eric Harris and Dylan Klebold killed 15 fellow pupils.
The teenager also worshipped Anders Breivik who killed 77 people in a mass shooting and car bombing attack in Norway eight years ago.
Judge Cook said: ‘Your interest was correctly described as an obsession.
‘The material you extensively gathered over time was graphic and unpalatable. It ran to thousands of pages.
‘You had taken practical steps as to how to put your plans into execution.
‘You worked out your budget, which was in excess of £10,000, and you priced the equipment to assist you in carrying out a mass killing.’
Davies also included notes such as ‘this one mr policeman’ with an arrow pointing to what appears to be his mental state.
Peter Binder, representing Davies, said his client had been diagnosed with autism and depression.
He said: ‘It is speculation as to how far down the road of actually carrying out some form of shooting the defendant would have got.’
Mr Binder said his client is no longer obsessed with school shooting or able to ‘lose himself’ in the normal or dark web.