A pervert obsessed with violent child porn and "snuff" videos
today admitted the torture, rape and murder of his 12-year-old niece.
Unemployed John Maden, 38, lured Tia Rigg to his home on the pretext of babysitting, but he drugged her and acted out his sick fantasies on the unsuspecting youngster, inflicting a horrific catalogue of sexual injuries before stabbing her and strangling her with a guitar wire
Maden, the brother of Tia's mother, Lynne Rigg, was due to go on trial at Manchester Crown Court for murder today but pleaded guilty
Maden had become obsessed with violent porn he downloaded from the internet, the court heard.
Members of Tia's family sat in the public gallery, yards from Maden in the dock as Gordon Cole QC, prosecuting, opened the case.
"In the year or so prior to April this year, the defendant had developed what can properly be described as an obsessive interest in images and literature relating to paedophilia, rape and torture.
"He had an extensive library of such materials which included literature dealing with methods of killing."
On a laptop used by Maden, police found hundreds of extreme images of child porn featuring bondage, rape, sado-masochism and violent sex acts.
A CD-rom belonging to Maden also contained images depicting abduction, rape and "snuff" movies.
From his mobile phone, police recovered folders of rape and torture entitled "snuff" and "snuff stories" and "brutal rape".
Text files showed stories taken from a 'handbook' relating to snuff movies.
Mr Cole continued: "This material and the subsequent discovery of Tia reveals that this defendant was acting out a long-held fascination with rape, torture and abuse of children.
"He re-enacted scenes from his collection of pornographic material."
Tia arrived at the defendant's house just before 3pm, with Maden then free to act out his "sexual fantasy" to kill her, the court heard.
Just 45 minutes later, Maden called police, with two officers arriving at the address two minutes later. He directed them upstairs.
In a spare bedroom, Tia was found lying face up on the floor, naked apart from a pair of socks, and clearly dead
Near her body were two knives stained with Tia's blood
There was a ligature around her neck and her hands were tied behind her back with shoelaces.
A post-mortem examination revealed that Tia had been stabbed in the abdomen and suffered severe injuries, some of which had been inflicted while she was still alive.
Her injuries led to severe blood loss but the "predominant" cause of death was ligature strangulation.
Toxicology tests revealed an anti-psychotic drug, Olanzapine, prescribed to the defendant, was present in her blood, which would have had a sedative effect.
Maden was arrested and later told police he heard "voices - one good voice and one bad voice - in his head" but admitted the rape and murder of his niece
"He said the voice, the bad voice, had been controlling him and telling him what to do," Mr Cole added.
Maden, dressed in a black shirt, paisley tie and green jacket and carrying an A4 folder, sat impassively in the dock as details of the injuries he inflicted on his niece were read out in court.
Maden faces a mandatory life term for murder when he is sentenced later today.