Zhao Yu's dinner was the same as many of the other policemen's, a packed meal, which had been sent over from the cafeteria in the hospital. Just as he was enjoying his meal, good news arrived from the criminals' ward.
Apparently, Ah Biao, who had been beaten up by Zhao Yu, had finally confessed to his crime! Maybe it was because he had just gotten out of his surgery and was still in a fragile state mentally, or because the police offered him preferential treatment and it moved him, or even due to the fear that Lao Feng wanted to kill him, but he confessed about everything that he knew about the Hasty Murder Case!
Similar to Zhao Yu's and the others' speculations, Ah Biao and the rest were just a bunch of outlaws that Lao Feng had gathered up. Hence, these people were all professionally trained and were very skillful at committing various crimes.