Looks like 1 impeached, convicted, and jailed, 3 tried and jailed after leaving office, 1 committed suicide while under investigation for corruption, and 2 not charged with anything (one died shortly after leaving office, though, so he might not have had a chance to be charged with anything)
One was assassinated, Park Cung Hee, and would have been arrested and imprisoned likely, had he lived. He was the father of later President Park Geun Hye, who was imprisoned herself.
Comments
"I was just testing the country's reaction in case some despot got into power and I'm glad to say democracy held firm"....