Federal prosecutors have filed multiple charges against a 23-year-old South Korean man accused of running what they call the world's "largest dark web child porn marketplace." The now-shuttered English-language site, called "Welcome to Video," contained more than 200,000 unique videos or almost 8 terabytes of data showing sex acts involving children, toddlers and infants, according to the 18-page criminal indictment, and processed 7,300 Bitcoin transactions worth more than $730,000.
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