By sick and twisted teen monster...

On 4 October 2009, Kimberly Cates, 42, was home alone with her daughter, Jaimie, 11. Kim’s husband David was away on business so Jaimie was in her mum’s bed.

But as they slept, creeping towards the remote home in rural Mont Vernon, New Hampshire, was a viscous gang, planning a murder. The gang called themselves the Disciples of Destruction.

Steven Spader, 17, was their ringleader. He’d formed the Disciples of Destruction, along with Christopher Gribble, 20, and their loyal followers – William Marks, 18, and Quinn Glover, 17.

Spader demanded they prove their devotion with a bloody ‘initiation ceremony’. And tonight was the night…

They explored the dark, quiet house. Finally, they reached Kim’s bedroom. ‘Jamie, is that you?’ Kim asked. Instead, Spader loomed over her, clutching a machete – and started hacking…

Gribble was on the other side, slashing Jaimie with a knife.

As Kim and Jaimie screamed, Glover covered his ears and fled, but Marks stood watching, transfixed.

Jaimie begged them to stop. But Kim had over 32 injuries.

Her skull had been split open, her left eye socket destroyed, several of her organs pierced, many bones broken. Then Gribble slit Kim’s throat.

She was dead, hacked to death, and Jaimie lay lifeless.

The gang fled. Unknown to them, Jaimie had been pretending to be dead.

She’d been slashed 18 times, had her skull split open, her jaw shattered and her left foot partly severed. Yet, bravely she’d called police.

Gribble and Spader were triumphant. Sitting in a friend’s bedroom they laughed about the bloodshed – but the friend’s mother overheard…

She called the police. The gang were arrested.

Gribble admitted he’d wanted to kill someone for fun for a long time.

Marks and Glover offered to testify against the killer pair, in return for lesser sentences.

Before the trial, Spader passed notes to a fellow inmate, bragging… He called himself ‘the most sick and twisted person you will ever meet.’

In October 2010, Spader was convicted of murder, attempted murder, conspiracy and witness tampering.

He was sentenced to life without parole, plus an additional 76 years.

In March 2011, Christopher Gribble, 21, was convicted of murder, attempted murder, conspiracy to commit murder and burglary and witness tampering. He was sentenced to life without parole.

William Marks, 19, who watched the attack, admitted conspiracy to commit murder, burglary and first-degree assault, he was jailed for 30-60 years.

Quinn Glover, 19, who’d fled the bloody bedroom, was jailed for 20 to 40 years after admitting burglary, robbery and conspiracy.

Their friend, Autumn Savoy, 21, got five to 12 years for obstructing justice after helping them to dump their bloody clothes.

It’d been Kim’s birthday just days before the last sentence – and young Jaimie, 13, had written a message to her mum on Facebook…

I’ll love you forever and always… Every time I think of you I feel a huge chunk in my heart that I have lost…

By Rachel Tompkins