It would be more convincing to prove that Li Wenlin was murdered between these two points and that the route home was the shortest.

Only in this way can it be explained that Yan Yichun's house is to the east of Li Wenlin's house. If Li Wenlin was murdered to the west of Li Wenlin's house, then it is impossible to explain why Li Wenlin, after drinking at Yan Yichun's house, would take a long detour home late at night!

Ning Zhiheng now felt more confident. His previous thinking was correct: Li Wenlin walked home after drinking, so the place where he drank must not be far away.

Of his few friends, only Yan Yichun's home was relatively close, and the location of the murder was exactly on the shortest route between the two families' addresses, and the direction was also correct!

Unfortunately, no one can confirm Yan Yichun's whereabouts last night. Are there really so many coincidences?

As secret agents, they are least inclined to believe in coincidences, and now Yan Yichun is even more suspicious.

However, Ning Zhiheng still needed to be cautious. Yan Yichun's identity was too special, which made Ning Zhiheng have to treat her with care.

He arrived at Yan Yichun's residence, looked around to make sure no one was there, and without hesitation, took a few steps, leaped lightly, grabbed the edge of the wall, and with a slight effort, slid over and climbed over the courtyard wall.

It was during working hours, and Yan Yichun lived alone in this house, which was unoccupied. Ning Zhiheng landed lightly and walked a few steps to the door.

The door was locked, but unfortunately Ning Zhiheng didn't have the skills to pick locks. He shook his head. There were a few lock-picking experts in the Military Intelligence Investigation Department, but they were all in the intelligence section, and he had never had time to ask them for help.

Actually, Zuo Gang's lock-picking skills are quite good. I should find an opportunity to learn them in the future. Having another skill will make things easier.

Ning Zhiheng then inspected all the windows in the house, and found that each one was bolted shut from the inside, showing that Yan Yichun was very meticulous.

After all, he is an intelligence officer from the intelligence department, so he will pay close attention to these details and will not make any mistakes.

However, Ning Zhiheng was a little worried at this point. The window was easy to open; he could just pry it open gently with a dagger. But what would he do after he finished the search?

He couldn't put the window latch back on when he left, but if it couldn't be restored to its original state, Yan Yichun's alertness would have made it impossible for him not to notice the signs of someone entering, which would have been tantamount to waking him up.

After much deliberation, Ning Zhiheng finally decided to go in and take a look. Otherwise, he would be unwilling to give up. If he could find valuable clues inside that could prove that Yan Yichun and Li Wenlin's murders were related, then he would have fewer concerns and could directly take action against Yan Yichun. Then the case could be closed without Ning Zhiheng having to go through any more trouble.

The most important reason was the tight timeframe. Section Chief Zhao Ziliang's order was to find out the cause of Li Wenlin's death in the shortest possible time, specifically to determine whether his death was related to the Yong'an Bank's account verification operation and whether the operation had been leaked. This was of paramount importance.

After all, the Yong'an Bank was specifically entrusted by the Director, and it was the key to whether the Military Intelligence Investigation Bureau could cripple the Japanese spy organization's intelligence forces in Nanjing in one fell swoop. At present, this was the most important thing for the Military Intelligence Investigation Bureau!

More than ten hours have passed since Li Wenlin's death. The intelligence battlefield is ever-changing, and accidents can happen at any time.

Ning Zhiheng had no time to waste. With that thought, he pulled out his dagger from his calf, inserted it into the crack of the window, and gently pried it open. He quickly pried open the window latch and pushed the window open!

He rolled inside, making no effort to hide any traces. In the end, he couldn't fool Yan Yichun anyway, so he might as well make it look like a burglary. If Yan Yichun was really innocent, it wouldn't make him suspicious.

Ning Zhiheng searched the rooms carefully, from the inside out: the bedroom, the living room, the storage room, and so on, but found nothing.

The house was very clean, not at all like the house of a bachelor. He found two hundred yuan in Chinese currency and two gold bars in the bedroom, which he put into his pocket to make it look like a theft.