I'd recommend 'Falsify' staring Nam Goong Min and Uhm Ji Won. Here's the description from asianwiki: Reporters Han Moo-Young (Namgung Min) and Lee Seok-Min (Yu Jun-Sang) and Prosecutor Kwon So-Ra (Uhm Ji-Won) struggle to unveil the truth that was falsified.
A powerful story about how the falsification of news has the ability to manipulate the public and ruin one's family, and how one reporter will do all it takes to find out the truth about his murdered brother.

I recommend you the crime drama "Signal" if you havent seen it yet. Its great and main actor is really hendsome :D