Liang Ke rushed to the East Palace with Zhao Xue.

As soon as he encountered the case, he was completely immersed in it.

He carefully examined Master Zhong's body, sparing no details and confirming it repeatedly.

Judging from the corpse spots, Master Zhong should have died before he could be, that is, the three teas after Huzi left the Waguo in the dining room.

Master Zhong did not have any other injuries on his body, only black and red pus and blood flowing from his nose, mouth and ears, and rice soup-like residues on his chin, chest, and underwear.

Liang Ke opened his lips and sniffed, there was a metallic smell.

"Arsenic poisoning." He concluded.

The osmanthus cake eaten by Master Zhong is sprinkled with a powder made of white sugar and soybeans, so the white arsenic mixed in it is not visible at all, and it cannot be smelled, because the fragrance of the osmanthus cake is very strong, covering the metallic smell of arsenic.

"Hasn't Grandpa Wu been found yet?" He asked.

"Nope." The soldier replied.

There was only one hour left before dark, and he had to hurry.

He walked along the way Wu Gonggong went back.

There are only two ways for Gonggong Wu to go back, one road and one path.

These two roads only fork near Yanhu Lake.

Liang Ke reached the fork in the road, stopped, and stared carefully at the ground.

The road is paved with bluestone, and the bluestone and bluestone are closely connected together, and the road surface is cleaned clean, and it is difficult to find footprints.

But there is a two-foot-wide gap between the bluestones and the bluestones on the path, and there is dirt in the middle.

Not every footstep of passers-by happens to step on the bluestone, so there are shoe prints on the mud with half a heel or half a forefoot.

Liang Ke analyzed these shoe prints one by one and spliced them into a complete footprint.

At one point, there are footprints that leave the bluestone and head towards the lake.

He measured it with his fingers on the ground, then stood up and ordered: "Go into the water and salvage." ”

Not long after, someone found the body of Grandpa Wu, who had sunk to the bottom of the water.

"How do you know he's overboard?" Zhao Xue asked curiously.

"His footprints have gone and never returned." He replied.

When the body was lifted, he found that although there were no injuries on his body, there was no fluid in his abdomen, and it was obvious that he had been pushed into the water after death.

Judging from the fact that he killed him, even if the osmanthus cake was poisoned by Wu Gonggong, there must be an accomplice or mastermind behind the scenes.

He was basically sure that except for the poison sent to the East Palace, there should be no problem with the others, otherwise there would be no need to kill people.

When he and Zhu Qi arrived at the dormitory, their subordinates reported that at present, except for the one in the East Palace, no other eaters were found to be poisoned, and the imperial doctor also checked all the collected food and found no poison.

It seems that this poisoning was specifically aimed at the crown prince alone.

Father-in-law Li, who was in charge of distributing the gifts, sent the unfinished gifts and the distribution account books.

The undistributed pastries were wrapped in a very nice wrapper, dated, written on what's inside, and wax sealed.

"Father-in-law Li, when did you give this gift to Father-in-law Wu?"

Gonggong Li replied that it was in the morning, and said that Gonggong Wu received this pastry and went directly to the East Palace.

Judging from the time when Donggong received the gift, Grandpa Wu did not stay on the road for long.

According to Zhu Qi, the wax seal was intact before he opened the pastry.

If Grandpa Wu had to do tricks, he had to break the wax seal and then reseal it with a wax seal tool.

But this wax is the green wax of the unique Uno country, and Gonggong Wu should have this kind of wax, unless he colludes with the Uno country and has prepared this green wax in advance.

"When you go and check Grandpa Wu's room again, do you find this kind of wax? Or traces of this wax? ”

"No, sir." The subordinate came back to report.

In this case, there is a possibility that he is complicit.

One possibility is that the conspirators helped him quickly unpack, sprinkle arsenic into the pastry, and reseal it.

It is also possible that his accomplices had prepared the poisonous pastries in advance and exchanged them for the pastries he had on hand.

If it's the second option, the accomplice should have an extra pastry on hand.