Watch episode 15 with English subs:
Tae Oh is aghast at having swerved his car but it’s obvious to Mu Yeom that Tae Oh has no wish to die.
Mu Yeom re-enacts the probable scenario where Gapdong had killed the victim Crybaby without knowing that she likes him.
Besides checking on Chief Cha’s DNA, they would have to check out his travel records as a possible suspension of the statute of limitation.
Their wait for Chief Cha to take the bait finally pays off as he drops in to check out Tae Oh’s claim that he knows Gapdong’s identity.
Cheol Gon had gone to Japan to check out Gapdong’s DNA and discovers that the sample had been contaminated at the point of collection. He finally acknowledges his long time bias towards Mu Yeom’s dad and passes Mu Yeom a tube containing his dad’s DNA.
Though Cheol Gon did not say it directly, it was his way of apologizing as he refers to Mu Yeom’s dad by name and no longer as a suspect.
Cheol Gon is just as shocked when Mu Yeom reveals that Chief Cha is Gapdong and though they’re determined to get him, they do not have any concrete plans on how they were going to do it.
As there were no reported news on Gapdong’s DNA sample being contaminated, Tae Oh suggests that they could manipulate it with Chief Cha’s DNA to get a match.
Mu Yeom does not agree to such an unethical deception and is disappointed with Oh Maria for wanting to follow Tae Oh’s suggestion.
But being a victim herself and desperate to get Gapdong, Oh Maria does not want them to lose this opportunity.
Cheol Gon too is willing to manipulate Gapdong’s DNA but Mu Yeom is adamant that they should not do so.
The following scene of confrontation between Mu Yeom and Chief Cha is another one of Sang Hyun’s best performance ….. hopeful eyes that hardened with frustration and anger as the latter remains unrepentant.
Mu Yeom feels that he should give Chief Cha a last chance to come clean and finds out the he had known all along about Gapdong’s contaminated DNA sample.
He warns Mu Yeom against using manipulation which would be futile as Gapdong (himself in other words) would reveal the deception about the contaminated DNA sample.
Passing Chief Cha his book titled Crime & Punishment, Mu Yeom asks him whether it’s heavy ….. in other words, whether his crime had been a heavy burden. It was Mu Yeom’s way of telling Chief Cha that he knows he’s Gapdong.