Mr Roh Hoe-chan, a three-term lawmaker of the left-leaning Justice Party, had been under investigation for allegedly receiving 50 million won (S$61,000) from a powerful political blogger linked to many top politicians.
The blogger, popularly known by his online nickname "Druking", is on trial for using illegal hacking programmes to sway public opinion on Naver, South Korea's top online portal.
More details from Korean political commentator Jung Sik Seo
