After Mu Qingcheng sat down, he glanced at Chen Yufei, and the other party was also staring at her, his expression was not very friendly. When they met her for the first time in the hospital, Mu Qingcheng felt that this female criminal police officer was very indifferent to people and was not easy to get along with. But now the sensitivity of women makes her aware that Chen Yufei is a little hostile to her in addition to indifference, and the source of this hostility is probably Cheng Yijie, I don't know if the relationship between her and Cheng Yijie is a happy relationship, or unrequited love?

Cheng Yijie beckoned to the waiter, ordered three cups of juice, and drank coffee by himself.

"Everyone is here, I can start talking." Ji Rongrong didn't care about anything else at this time, she was only anxious to report the unusual situation on her side.

"Say it." Chen Yufei still had a cold look.

"Look at this." Ji Rongrong put her mobile phone on the desktop, and there was a whole row of call records on it, all of which were a mobile phone number starting with "137".

"Since this morning, I've been receiving this call, and I've hung up as soon as I got through. The penultimate time, the other party finally spoke, it was a man, what he said, I couldn't hear clearly, it seemed to mention the USB flash drive, and he quickly hung up the phone again. Ji Rongrong's voice trembled, "At nearly half past four in the afternoon, I received the last phone call. He said he was Jiang Lei...... He killed Yang Ru...... I can't live anymore...... Let me go to Room 302, Building 4, Jinzhou Garden, tonight to collect his body...... Listening to the voice on the phone, I looked drunk, as if I had drunk too much. ”

"I got a call at half past four, why didn't you call me until after seven o'clock?" Chen Yufei questioned.

"There's an important academic conference in the department at 4:30 a.m., and I'm going to give a speech. When I received the call, a few of my classmates and I were already late, and then we hurried to the conference room, where else could we care. Ji Rongrong explained, "Because there are a lot of people who speak, now."

The discussion was very lively, and the meeting lasted until 7 o'clock, and I will call you as soon as it is over. This shop is right next to Jinzhou Garden, so I asked you to meet here. I think it's possible that he's drunk and babbling, but I should tell you anyway. ”

Chen Yufei asked again: "At the scene of the explosion that day, you really didn't see who took Yang Ru's USB flash drive?" ”

"True, please trust me. It was a mess that day, and it was too late to escape for my life, so where could I take care of it. Ji Rongrong eagerly declared, "I guess that the person who took the USB flash drive was for the information inside." Although there are several people in Yang Ru's research team, the most core and confidential things are only in his own hands, and the rest of us can't touch them, even me. Those things should be hidden in a USB flash drive. ”

"In that USB flash drive, is the confidential information for researching the 'invisibility cloak'?" Mu Qingcheng finally had some clues, "But it's not safe to put it in a USB flash drive, such as the USB flash drive is lost or damaged." ”

"I don't know." Ji Rongrong said, "Originally, he should have had it in his laptop, but the computer has been destroyed in the explosion, and it is possible that the data only exists in the USB flash drive." ”

"If you have it on your computer, why do you use a USB flash drive for your speech?" Mu Qingcheng had a lot of questions.

"Okay, don't talk nonsense, let's go to Room 302, Building 4, Jinzhou Garden, to see what's going on." Chen Yufei regarded Mu Qingcheng's question as "nonsense".

Mu Qingcheng was a little embarrassed and a little helpless. Chen Yufei had already gotten up and walked out, and Ji Rongrong hurriedly followed behind her.

Cheng Yijie quickly checked out, and Mu Qingcheng caught up with him.

Jinzhou Garden is an old community, the four of them arrived at room 302, the door was not locked, twisted the doorknob to open, Chen Yufei took the lead in pushing the door in, the indoor lights were not turned on, but by the bright light from the open window directly opposite, a person lying on the ground could be identified. She told the others to step back, find the switch and turn on the chandelier, and went up to check. It was a man, lying upright, eyes closed. She sniffed, dead of death.

"Is this person Jiang Lei?" Chen Yufei asked Ji Rongrong to come close to identify him. Ji Rongrong winced, barely took a closer look, and immediately turned her face away in fright. "Yes...... It's Jiang Lei. ”

Cheng Yijie walked to Ji Rongrong's side, looked at the corpse on the ground in front of him, and his eyes fell on the coffee table next to the corpse, on which was placed a bottle of opened wine, a wine glass with a small amount of wine left, and a small bottle of something that seemed to be medicine.

Chen Yufei also noticed it, put on his gloves, picked up the small bottle, and opened it. "It's sodium cyanide." She said that it was not difficult for the polytechnic to obtain this highly toxic chemical, and it was possible to commit suicide by poisoning.

Cheng Yijie didn't make a sound, he quietly inspected the interior of the whole house, the layout of two bedrooms and one living room, the entrance is the living room, the two rooms on the left side by side, the entrance is the bedroom, and the inside is the study, the area is not large, and the furnishings are simple. On the other side of the living room is the kitchen and bathroom, and without a dining room, the dining table is placed in the corner of the living room.