And he is a runaway patient
He has a lot of criminal cases under the table too
Even Jaekyung has a higher chance to change than him istg
For real, Jaekyung is not this worse. He doesn't hurt Dan like how this seme did when Inseob was about to run. Jaekyung is not a psychopath.. But comparing these two.. Do we really see any potential for development? Lol
But you will see how they both struggled from his mental illness in the long run and that's what makes it all the more interesting.
Don't forget that he's clinically diagnosed as a sociopath, so if you're asking for a character dev.. well.. he will get there but it's hard since he is mentally ill.