A Murderous Affair in Horizon Tower Episode 12

Yan Jun files a report against Yan Yong Yuan. He explains that two years before when he had his first tour, his father found him. He shows up at his house and threatens him with a photo of Mei Bao. He asks for blackmail money in exchange for not publishing the photos. Yan Jun gives him money, hoping he would go away but he keeps asking for more until a year earlier, he refuses to give him more money and Yan Yong Yuan says he'll kill his sister. Meanwhile, Yan Yong Yuan shows up inside Mo Li's house and asks them to tell the truth about Mei Bao's murder and that he is innocent. Zhong and Yang are called to Horizon tower and confirm the man to be Yan Yong Yuan. However, they still do not have hard evidence for his arrest. The record that they used as bait is finally sold but the buyer was an ordinary person. They check the record again and find Yan Yong Yuan's finger print on it. They finally issue an arrest warrent for him. Yan Yong Yuan comes to the station himself. (Source: Autumn carrot at MyDramaList)