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16 October 2017, 18:36
A Cambridge University graduate has pleaded guilty to 137 offences - including blackmailing victims into sending him severe abuse images of themselves and sharing them on the dark web.
Dr Matthew Falder, 28, also admitted charges of causing the sexual exploitation of a child, voyeurism, making and distributing indecent images of children and encouraging the rape of a four-year-old.
Since 2010, the Birmingham University employee degraded and humiliated more than 50 victims online using the names "666devil" and "evilmind".
He was arrested on June 21 this year and has been held in custody since that date.
Falder, of Edgbaston, Birmingham, posed as a female on sites such as Gumtree to trick his victims into sending him naked or partially-clothed images of themselves.
The disgraced geophysicist then threatened to expose his victims if they did not send severe and depraved abuse images of themselves.
He then distributed the images, including some which showed babies and children being tortured, on the dark web, and discussed them at length to humiliate and degrade the people who were the subject of the pictures.
The case is the National Crime Agency's first in "hurt core" offending - the hidden web forums dedicated to the discussion of and video sharing of "dark" material.
Judge Philip Parker QC remanded Falder into custody until December 7, when he will be sentenced at Birmingham Crown Court.