This sounds more like something Shen Jingye would say.
Li Banfeng said, "Have you found out everything about Yu Yaoming? Where did his dark ability come from, and why did he kill Yan Youjun?"
Shen Jingye sighed and said, "You might not believe me when I tell you, this is his confession, take a look first."
Li Banfeng accepted the confession, "Can I read this? Aren't you afraid I'll interfere with his testimony?"
"I'm not afraid!" Shen Jingye shook his head, "Showing it to others would just be a waste of time, but showing it to you might actually be useful."
As Li Banfeng flipped through it, Shen Jingye explained, "According to Yu Yaoming's confession, he wasn't aware of the concept of dark abilities, he's not a cultivator or an enthusiast of dark abilities, his special abilities came from some experiments."
"What kind of experiments?" The confession was somewhat scattered, making it hard for Li Banfeng to search through.
