It was Shentu Tianyin. 

“I’m sorry, I have to get this.” Xia Lei left the table, walked several meters away and stopped to answer her call. 

“Lei, I…” Shentu Tianyin spoke but stopped. 

“What’s the matter?” Xia Lei was puzzled. “Why are you stuttering?”

Shentu Tianyin was silent for a moment. “I don’t know how to tell you this, I…”

“You can tell me anything. What is it?” Xia Lei had his guesses but he wasn’t sure. 

“I made a mistake. I’m so sorry.” Shentu Tianyin sounded very regretful. 

He smiled bitterly. “Is it because of this? How many times have I told you? The past is the past. Every person makes mistakes. We cannot dwell on it.”

“About that…'' Shentu Tianyin hesitated but finally said, “I don’t know who reopened the case. Several people came to my house this evening, saying they’re some investigative team. They asked me several questions that were hard to answer. I didn’t want to bother you but I also don’t know what to do, so I…”

“Are these...