Kuo Hsiung Yang, 33, of 200 Westminster Drive in Chapel Hill, was arrested on 10 state charges of second-degree exploitation of a minor in November. Police said Yang duplicated numerous videos showing girls, some of whom appear as young as 8 to 10 years old, being sexually assaulted by men.
Yang was indicted by a federal grand jury on two counts of possession of child pornography.
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Yang had been employed by UNC beginning in 2012 and was working on research for HIV and AIDS.
