Not sure exactly how a smart person can choose to do something that's so obviously going to get him caught and ruin his career. Lying about something as highly visible as an AIDS vaccine seems just plain stupid, whatever the ethics of it may be...
Reproducibility is a big problem in biology right now. He probably thought he could delay people finding out until he can produce good legitimate research that might distract attention away from the faked data.
I was thinking, "please don't be Chinese" when I read the title. Fuck.
However, this researcher appears to be Chinese based on his previous publication history (he was affiliated with a university in Shanghai prior to coming to the states which is unlikely occurrence for a Korean)
Smart people do dumb or evil things all the time. There was a submission to HN a while ago about someone who went to jail for fraud. But to get to that point he needed a lot of other people to help him or to turn away. He didn't need any clever manipulation. He just asked them. And each of them complied, knowing that what they were doing was wrong.