Su He was somewhat suspicious, but regardless, the fact that the letter had appeared meant that someone was definitely watching them from the shadows.

They need to speed things up.

However, another piece of news soon interrupted their speculation.

After having their handwriting analyzed by experts from the bureau, they discovered that the letter was not written by Yan Xiangdong!

Who could it be?

But where did Yan Xiangdong go?

Why was a steel mill mentioned in the letter?

So, Su He thought about it, took Yan Xiangdong's photo to Qi Yang, and told him about it.

Qi Yang was also quite skeptical upon hearing this. Although he, like Su He, felt that Yan Xiangdong, as a supply and marketing cooperative employee, was incapable of doing anything, he still went to investigate.

But the investigation yielded a surprising result.

Based on Yan Xiangdong's photo, the person who received him at the steel plant immediately recognized him, saying that he was the one who took away ten tons of steel with the receipt!

Su He and the others were surprised that they found out so easily, and that the two cases were even connected!

However, after the initial surprise came doubt.

How did Yan Xiangdong, an ordinary employee of a supply and marketing cooperative, manage to take steel from such a large factory?

Again, where did he get the receipts? Where did he get the transport vehicle? And where was the steel transported to?

The key issue is that Yan Xiangdong is currently missing, neither alive nor dead. If we cannot find him, then the leads for both cases will be lost.

Thinking about this, Su He and the others felt quite helpless.

Fortunately, the two cases have now been combined, and they can investigate them together again.

So the group sat down to discuss their next breakthrough point.

Zhou Yan thought about the loopholes in the whole case and said directly, "I think we still need to investigate who delivered Zhu Dayong's letter. The person who delivered the letter must know where Yan Xiangdong went!"

"Didn't they say it was delivered in the middle of the night? Nobody saw it around. I should have kept an eye on it!" Hu Xing said with some regret.

Su He shook her head. "Back then, we didn't know what the person behind it would do. That person was so cautious; if we had kept an eye on him, he might have used a different method."

"Yes," Qi Yang nodded. "Since the two cases are related, it means that they were the ones who followed the police officers' families before. Since they dared to do this, it means that these people are not afraid. If we keep a close watch on them, they might do something even more dangerous."

Hu Xing sighed after hearing this, "So what do we do now? Is there absolutely no way to break through?"

Su He thought for a moment and said, "It's not that there isn't. You've forgotten one thing. The person who initially told Zhu Xiaolian that Yan Xiangdong was on a business trip came to her door himself. So, it means that this person must be someone she knows. Otherwise, she wouldn't have believed it so easily. We can investigate from this angle."

"But didn't we investigate before and find no witnesses?"

"That gave us a direction for the investigation. This person is likely his colleague, friend, or someone with whom he has a close relationship."

And don't forget we still have his handwriting; that letter must have been written by someone behind it. We can start by investigating the people around Zhu Xiaolian and Yan Xiangdong.”

“Okay, I’ll collect these people’s handwriting samples,” Qi Yang said directly after hearing this.

Su He nodded, "Okay, then I'll go find another witness and see if I can get any information out of them."

"Another witness? Who is it?" Hu Xing asked curiously.

Su He smiled. "Guess?"

Hu Xing frowned and scratched his head. "No? If there were witnesses, wouldn't we have already investigated?"

At this moment, Qi Yang suddenly said thoughtfully, "You mean...it's her?"