Why is South Korea retrying a spy chief who assassinated a president?

Suhnwook Lee BBC Korean Two gunshots. That is how Yoo Seok-sul begins recounting the night of Friday, 26 October, 1979. A former security guard in the Korea Central Intelligence Agency, or KCIA, as the South’s spy division was known, Yoo has many stories to tell. But this is perhaps the most infamous. He remembers the…