Team Leader Jang's Daughter... When Did You Suspect It?

Park Joon-tae testifies that he was the only one at the scene when he murdered Choi Young-min. Tae-soo brings Sung-hee to the interrogation room and pushes Park Joon-tae, and he confesses that he killed Song Min-ah to protect Sung-hee. Meanwhile, the police find out whom the necklace found at Choi Young-min's crime scene belonged to.