How Did a Criminal Chosen by Fate Become a Master Detective?!

Song Han was bound to a System.

But other people's Systems were things like [Master-Level Case Solving], [Unbeatable Interrogation], and [Golden Finger Marksmanship]. His System had [Master-Level Theft], [Perfect Counter-Surveillance], and [Ultimate Brainwashing]...

Song Han: ???

A criminal police officer paired with a crime System? Are you serious?

System: Host, please use your skills wisely.

Song Han: How am I supposed to use them wisely? I can't exactly challenge a suspect to see who's faster at stealing, can I?

Later...

He actually did.

He stole a master thief's tools of the trade, making the man break down on the spot.

He chased a counter-surveillance expert until the man questioned his life choices, then tearfully said, "You're even more like a criminal than I am."

He used reverse PUA on a psychology expert until the man confessed of his own accord, and even gave up his accomplices.

Song Han smiled at the camera. "It's perfectly reasonable for a police officer to know a few criminal skills, right?"