After hearing this, General Cheng subconsciously raised the pillow to the tip of his nose, and after a sniff, he found that the pillow did indeed have no smell as Ling Yu said, and it was clean, with no sweat stains at all.

"If this is not the pillow that Mrs. Cheng slept on, someone has changed the pillow!"

Ling Yu smiled coldly: "The pillow can be changed, but the mattress cannot be changed!"

As Ling Yu said this, she climbed onto the bed, opened the sheets on top, and revealed the mattress underneath.

Ling Yu took out the dagger from her waist and cut off a piece of mattress.

She got out of bed and handed it to General Cheng. General Cheng saw that the originally white mattress had turned yellow and there were some sweat stains on it.

"General Cheng, come here!"

Ling Yu walked to the window and took out several glass bottles from the space, one of which contained some potion.

Ling Yu soaked the cut mattress in the potion, and General Cheng saw that the potion slowly turned red.

"What does it mean?"

General Cheng asked in surprise.

"I prepared the potion, which can reveal the toxins in the bedding. Mrs. Cheng is suffering from lead poisoning. Lead can cause nervous system function and organic lesions, with specific manifestations such as headache, dizziness, drowsiness, nausea, vomiting, etc.!"

"When the condition is severe, hallucinations, disturbance of consciousness, amnesia, brain herniation and other phenomena may occur. This is why some people say that Mrs. Cheng has a brain tumor!"

Ling Yu said in a deep voice: "I suspect that someone added lead powder to Mrs. Cheng's pillow. I guess General Cheng announced that Mrs. Cheng was poisoned when he came back. The poisoner was worried about being found out, so he changed Mrs. Cheng's pillow!"

"It's just that this person forgot that Mrs. Cheng has been exposed to lead powder for a long time, and her blood and sweat also contain lead elements. She changed the pillow, but forgot to change the mattress soaked in sweat!"

General Cheng was not a fool. Thinking of Ling Yu asking about how many aunts and children he had before entering the door, he asked with a sullen face: "Do you suspect that one of my aunts did it?"

Ling Yu frowned: "Men like to take action directly when they have a grudge, but women like to poison, especially such patient and chronic poisons!"

"As for the grievances between big families, to put it bluntly, they are jealous and seeking a future for their sons! General Cheng, you know your family better than I do. If you follow this line of inquiry, it will be easy to find the poisoner!"

General Cheng only had three sons, one legitimate son and two concubines.

Just thinking about it, his face suddenly changed and he asked eagerly: "Miss Xing, you just said that lead poisoning can cause headaches, dizziness, drowsiness, nausea, and vomiting. Are there other symptoms? Such as insomnia, nightmares, and weight loss.

?”

Ling Yu nodded: "In the middle stage of poisoning, there will indeed be symptoms such as insomnia, anemia, abdominal cramps, liver and kidney damage, etc. The symptoms vary from person to person!"

General Cheng's face was as dark as ink, as was his eldest son Cheng Xu.

Before, General Cheng thought that he was acting like this because he was weak and worried about his mother's condition, but he never thought that Cheng Xu had also been poisoned.

"This poisonous woman!"

General Cheng suddenly drew his sword. Who else would do such a thing except Aunt Feng!

Did she think that after killing her own son, she would focus on raising two bastards?

General Cheng said that he was about to rush out and kill Aunt Feng.

Ling Yu quickly shouted: "General Cheng, don't be impulsive! Most people would never think of lead poisoning. You asked Baili Hai and Vice President Dong to check on Mrs. Cheng before, but they didn't know about the lead poisoning. You went to Feng like this."

Auntie, she won’t admit it!”

"I have a plan to make her confess!"
Chapter completed!