I read the second link first (the newsasia one), and for the life of me I couldn't figure out how that deal was supposed to go down--but it could be that I haven't had enough coffee yet this morning.
This looks like it's fallout from the ICO and/or IEO craze that ended not too long ago. Usually after bubbles pop, all the thieves start getting exposed, so that part doesn't surprise me. It's happened with stock market bubbles many times in the past.
Is this the beginning of the fall of one of South Korea's Largest and oldest exchanges?
Sounds like it, though I'm not too familiar with wash trading penalties in S. Korea, nor does it sound like it was a problem with the exchange itself but with one man.
Are we going to see continued crack down on crypto exchanges in South Korea?
S. Korean regulators are certainly cracking down on exchanges, that much is for sure. I don't know how many there are based out of that country, but I bet you that the rest of them are under the microscope right now and I'd also bet that more than one or two are starting to sweat (and there's probably some document shredding going on as well).
Interesting developments. Thanks for posting this info, OP.