How Bitcoin transactions were used to track down the 23-year-old South Korean operating a global child exploitation site from his bedroom
![Demonstrators receive medical treatment in a hospital after police fired on people protesting over a Facebook post by a Hindu who allegedly defamed the Prophet Mohammed, in Barisal on October 20, 2019. - At least four people were killed and nearly 50 injured on October 20 after police fired on thousands of Bangladeshi Muslims protesting a Facebook post by a Hindu who allegedly defamed the Prophet Mohammed, officials said. (Photo by STR / AFP) / The erroneous mention[s] appearing in the metadata of this photo by MUNIR UZ ZAMAN has been modified in AFP systems in the following manner: [STR] instead of [MUNIR UZ ZAMAN]. Please immediately remove the erroneous mention[s] from all your online services and delete it (them) from your servers. If you have been authorized by AFP to distribute it (them) to third parties, please ensure that the same actions are carried out by them. Failure to promptly comply with these instructions will entail liability on your part for any continued or post notification usage. Therefore we thank you very much for all your attention and prompt action. We are sorry for the inconvenience this notification may cause and remain at your disposal for any further information you may require. (Photo by STR/AFP via Getty Images)](http://cdn.cnn.com/cnnnext/dam/assets/191021150439-bangladesh-riot-01-small-tease.jpg)
![Demonstrators receive medical treatment in a hospital after police fired on people protesting over a Facebook post by a Hindu who allegedly defamed the Prophet Mohammed, in Barisal on October 20, 2019. - At least four people were killed and nearly 50 injured on October 20 after police fired on thousands of Bangladeshi Muslims protesting a Facebook post by a Hindu who allegedly defamed the Prophet Mohammed, officials said. (Photo by STR / AFP) / The erroneous mention[s] appearing in the metadata of this photo by MUNIR UZ ZAMAN has been modified in AFP systems in the following manner: [STR] instead of [MUNIR UZ ZAMAN]. Please immediately remove the erroneous mention[s] from all your online services and delete it (them) from your servers. If you have been authorized by AFP to distribute it (them) to third parties, please ensure that the same actions are carried out by them. Failure to promptly comply with these instructions will entail liability on your part for any continued or post notification usage. Therefore we thank you very much for all your attention and prompt action. We are sorry for the inconvenience this notification may cause and remain at your disposal for any further information you may require. (Photo by STR/AFP via Getty Images)](https://search.webdepozit.sk/webarchiv/public/20191022154832im_/https://cdn.cnn.com/cnnnext/dam/assets/191021150439-bangladesh-riot-01-large-tease.jpg)
