Detectives have told how two Doncaster men trawled websites for young boys so they could commit a series of sex crimes over a number of years and across the country.
Anthony Marsh and Lee Davis had appeared in court last month where they pleaded guilty to a total of 55 offences at a plea and case management hearing.
But a further 14 offences were denied, and the Crown Prosecution Service was granted two weeks by the court in which to decide whether to pursue these remaining charges through a trial.
South Yorkshire Police could not give further details until Monday of this week when the CPS informed the court and South Yorkshire Police that it has decided not to seek a trial.
The pair will be sentenced on December 2 for the crimes they have admitted committing.
Anthony Marsh, 53, of Menson Drive, Hatfield, who also used the names Tony Taylor and Tony Smith, had pleaded guilty to 34 offences including possessing and distributing indecent images of children, and sexual activity with a child.
Lee Davis, 39, of Rowena Road, Conisbrough, who also used the name James Parkin, had pleaded guilty to 20 offences including rape, sexual activity with a child, and taking indecent photographs of a child.
Both men were also jointly charged with conspiracy to commit sexual activity with children, and both admitted this offence at the earlier court hearing.
The offences to which they pleaded guilty date back to 2005 and involved teenage boys from South Yorkshire, Humberside, the north east, north west and the midlands, aged between 13 and 17.
Det Insp Delphine Waring, who led the investigation, said: “Marsh and Davis committed many appalling crimes against young, vulnerable boys over many years.
“They searched various websites trawling for impressionable, young, vulnerable boys and having engaged in conversation then made arrangements to meet them.
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