He Zheng narrowed his dark eyes and spoke lightly.

"Take her back to the police station."

Xie Xiaojia and Xu Yancheng were both taken aback: "She has a problem?" ”

He Zheng picked up the water cup and took a sip.

Only then did he say slowly: "That's right." The problem is huge. ”

"Where did you see that?" Xu Yancheng looked the freeze-frame picture up and down, but didn't see anything abnormal.

He Zheng put down the water glass, rewind the video for dozens of seconds, and played it at a normal speed from the time the woman entered the elevator from the 14th floor.

"Normally, it takes about three to four seconds for an elevator to go down the first floor.

The woman came down from the 14th floor, and it took about 50 seconds. And in those fifty seconds, she plucked her hair eight times. Even if it's a habit, this frequency is too high.

In addition, her hands kept clutching the strap, constantly loosening and tightening, and judging from her standing position, her body muscles were in a state of high tension.

During those 50 seconds, her gaze kept bouncing up and down, and her nystagmus ......

All of the above shows that she is extremely nervous. ”

"That's all?" Xu Yancheng asked in disbelief, "Nervousness is not enough as evidence!" ”

He Zheng put the finished cup aside and smiled faintly: "Of course not." ”

He pulled the video back: "This is when she entered the elevator before, when Peng Wei and his wife had just gone out. Look at this dress on her. ”

He pauses for a few seconds, then fast-forwards to the woman leaving.

"Look at the dress she's wearing now, what's the difference?"

Xu Yancheng narrowed his eyes, looked at it carefully, and muttered, "The style seems to be the same...... But it seems to ...... But there's a little difference......"

Xie Xiaojia is a woman after all, and soon noticed something unusual: "The skirt seems to be a size bigger!" ”

That's right, at first, her skirt was fitted, but when it came out, it seemed to be a little loose, and the fabric at the waist and shoulders didn't fit well.

"She changed to another dress of the same style, but one size larger!" Xu Yancheng also understood.

Xie Xiaojia glanced at He Zheng, this picture was played at a super high multiple fast-forward speed, there were so many people coming in and out of the elevator, this guy could still see the subtle changes in the clothes of one of them.

How can a person's sense of observation be so sharp?

Her heart is full of admiration and appreciation.

As for Xu Yancheng, he was not much surprised by this, he had known He Zheng for more than ten years, and the latter had surprised him too much.

"But why did she change her clothes?" Xu Yancheng muttered to himself, and soon, he glanced at Xie Xiaojia: "Unless, her clothes are dirty!" But what is it that gets dirty? ”

The answer is, blood!

"Her clothes were stained with blood when she killed Xu Wanwan, so she found a white dress of the same style in Xu Wanwan's wardrobe and hurriedly changed her bloody clothes." He Zheng lightly tapped the slightly bulging black messenger bag with the tip of his pen, which seemed to contain something, "The clothes I changed into are probably in this bag." ”

"Of course, that's not enough for me to judge, but there's more to it than that." He Zheng said indifferently.

Xu Yancheng and Xie Xiaojia watched him zoom in on the video, and then pointed to the heel of the white high heel worn by the woman in the picture.

There, there was a small, dry, dark red spot.

And the true ingredients of this dark red spot are very familiar to both of them.

It's blood!