Christopher Priestley, 52, produced a paedophile guidebook and had more than 30,000 indecent images of children.
A paedophile has admitted writing a guide to preying on children and having more than 30,000 indecent images.
He also pleaded guilty at Sheffield Crown Court on Wednesday to amassing 30,886 indecent images of children. The National Crime Agency said he attempted to hide his offending behind "extremely high levels of encryption" on his laptop, desktop computer and external hard drive. Laura Scott, of the NCA's National Cyber Crime Unit, said: "Priestley sought out and downloaded an astounding haul of child sexual abuse material.
Danmark Seneste Nyt, Danmark Overskrifter
Similar News:Du kan også læse nyheder, der ligner denne, som vi har indsamlet fra andre nyhedskilder.
Sheffield: Paedophile who sent victims Valentine gifts jailedPeter Horsfield, 82, from Barnby Dun near Doncaster, abused children over a 17-year period.
Læs mere »
Sheffield Wednesday give official reaction to drawing Newcastle United in the FA CupDrawing Newcastle United out of the hat in the FA Cup - Sheffield Wednesday give official reaction the draw.
Læs mere »
Sheffield Wednesday fans react to getting Newcastle United in the FA Cup - InterestingInteresting comments from Sheffield Wednesday fans as they react to getting Newcastle United in the FA Cup
Læs mere »
Sheffield man in court charged with murdering coupleJames Andrews, 51, is accused of killing the pair, named locally as Mary and Brian Andrews.
Læs mere »
South Yorkshire Police appeal for help over disappearance of 12-year-old in SheffieldA man is in custody on suspicion of child abduction, after Mark was last seen two days ago, wearing a black puffer jacket and dark coloured jogging bottoms, in Parsons Cross.
Læs mere »