"You go and ask the Shuyan girl in the eldest princess's palace to come over, I have any questions to ask her."

If you want to check the source, you have to ask someone who understands.

"Yes." The men were ordered to leave.

The more Yun Wok thought about it, the more strange she felt about it, the evidence collected by the queen pointed out that Liu Yi, who was the most suspicious of Yin, was poisoning and cooperating with Xiunu, but Xiunu had just entered the palace, and it was still a question whether she could give birth to a child, so why did she have to attack the princess first? Besides, in terms of prestige, the queen's second princess is the most popular among the officials, shouldn't she be removed first?

Whether it was the perpetrator, the means of committing the murder, or the reason for the murder, Yun Wok couldn't think of a reasonable explanation.

Could it be that the perpetrator did not have a plan, but only planned to get rid of one person first, and then find an opportunity to get rid of the others later?

Such an explanation may be more convincing.

"Commander Yun, what are you looking for me for?" Shuyan came quickly, she had been guarding Luo Junnian last night and didn't sleep, and her face was still tired.

"Miss Shuyan, I've worked hard for you, I bothered you early in the morning because no one in the palace knew about the camphor grass, and now the clues are all broken, so I can only check from the camphor grass." Yun Wok is a person who knows Shuyan's identity, and he is naturally more respectful to her than others.

"Qingzhang grassland is produced in Northern Qi, it is a very rare poisonous weed, I have only seen it once when I traveled with my master, its characteristics are very similar to the antidote to the Phnom Penh grass, and the toxicity can only be retained for a short period of time after refining into poison, about half a month, so Commander Yun can investigate the people who have just returned from Northern Qi in the capital recently." Shuyan also thought about this matter, the humid and hot environment in the east could not grow camphor grass at all, and someone must have brought it back from Northern Qi.

It's just that recently, the war between the Northern Qi and the East has not stopped, and there are many people who have fled from the border, and if someone lurks in it, I am afraid it will be difficult to identify.

"Thank you, Miss Shuyan, I'll send someone to check." In fact, Yun Wok has been investigating the people who have recently entered Beijing in the capital, and it is difficult to screen without direction, but now that he knows that the camphor grass comes from Northern Qi and the toxicity is only half a month, it will narrow the scope.

"Commander Yun is really dedicated to the eldest princess." Before Shu Yan left, he left such a sentence that seemed to have deep meaning.

Yun Wok naturally didn't hear anything else, his love for Luo Junnian was because she also had the blood of the Yun family in her body, and Aunt Yunhua's love for him since he was a child also made him always grateful in his heart, and outsiders would not be white.

What he was worried about now was that even if he knew that the poison came from Northern Qi, he would still not be able to find the person who poisoned him, and he might be able to tell where he came from based on the accent and clothing of the person who entered Beijing, but after walking on the road for a few days, he couldn't tell.

There must be something he missed, and there really could be no one who could do it seamlessly without leaving any flaws.

No wonder the eldest brother always said that he was not suitable for the battlefield, he really couldn't think through all the possibilities of a thing, and he would always miss some important information points.

Now it would be nice if the eldest brother was in the capital, and there would be someone who could help him come up with ideas.

"Commander, a female corpse has been found in the koi pond in the Imperial Garden! Dressed in court maid costumes. Just when Yun Wok was at a loss, the advice of his subordinates lifted his spirits.

When he rushed to the scene with people, the queen had already sent Mama Lu to identify, "Lord Yun, this is Liu Yi!" ”