Although Sun Yihan was rescued, and the murderer of the Bank Hidden Corpse Case, Qiu Xinyang, was arrested, to those in the Rongyang Key Case Investigation Unit, the follow up tasks had just started: interrogating the criminal, recording the confession, medically treating the officers, examination of evidence, and much more. There were still many things that need to be done. Hence, all the detectives were busy from afternoon until late at night.
Zhao Yu's duties has also drastically changed. When he arrested the suspect back then, he could take a break, but as a team leader, he had no time for leisure anymore!
The task of interrogating the criminal fell upon his and Miao Ying's shoulders. By that point, the evidence was conclusive. Qiu Xinyang had been caught red-handed, so he confessed everything and told them everything there was to know about the Bank Hidden Corpse Case.