After they walked out of the interrogation room, Wu Zheng carefully thought over what Dong Chang had just said. Then, he looked at Shen Yin and said, "Do you think the murderer is Dong Chang or his father, Dong Heng?"
Shen Yin shook her head and said, "I don't believe what he said just now. Lies are always half-truths to make them more believable, but there's one thing I find strange."
Wu Zheng asked curiously, "What?"
Shen Yin stopped in her tracks and walked into the surveillance room. She pointed at the replay of the interrogation and said, "There are no injuries on his hands. In the third case, I deduced that the victim had probably scratched the murderer and the wound would still on his be right hand. However, Dong Chang's hand showed no signs of concealment. That wound would not have healed so quickly."
"That's strange." Wu Zheng also remembered this and asked uncertainly, "Could there be a problem with our deduction?"
