Diary of a Criminal Investigator

Half an hour later.

Criminal Investigation Team, Interrogation Room No. 1.

"Officer, you really got it wrong. How could I be a murderer!"

Seated on the interrogation chair, Dong Jun looked aggrieved: "If it weren’t for me noticing something was wrong and calling the property management, you wouldn’t even know the person was dead."

"This doesn’t count as a contribution, and I shouldn’t be labeled as a murderer."

"Besides, didn’t you say the person died of a cerebral hemorrhage? Why is this now being linked to murder?"

The officer responsible for Dong Jun’s preliminary hearing was Wang Zhaokai.

"Dong Jun, the fact that we brought you in here means we already have a certain amount of evidence."

"I advise you to come clean while there’s still time. Once I present the evidence, Dong Jun... it will be too late."

Conducting a preliminary interrogation requires skill.

You can’t just throw out the evidence right away.

Wang Zhaokai has been doing this for most of his life, having interrogated hundreds of offenders.

Dong Jun was no different from most people.

Not saying anything now, but will say everything later.

But at the start of an interrogation, whether by threat or lure, it’s essential to get the other party to speak first.

Because the clues that the police have are only part of the picture, and the other party’s words can validate whether those clues are correct or not.

Especially when interrogating habitual offenders, not telling them what the case or issue is, forcing the suspect to speak by themselves.

This can often lead to unexpected insights.

"I didn’t kill anyone, what do you want me to say?"

Lu Chuan’s office.

"Still no confession?"

Chen Jiang nodded: "No, Old Wang is still interrogating, but we’ve already checked Dong Jun’s phone. It indeed connected to Qin Weiwei’s home WiFi."

"On the video streaming app on his phone, we also found records of him playing ’Knocking Ghost’."

This basically confirmed Lu Chuan’s previous suspicions.

"Have him write the notification letter, just like Zheng Gaoxue, and I’ll compare the handwriting."

"Yes!"

The interrogation in the room reached a stalemate.

Dong Jun was resolute in saying nothing.

But after three hours passed, both the interrogator Wang Zhaokai and the interrogated Dong Jun were mentally exhausted.

After making Dong Jun copy out the notification letter, Wang Zhaokai continued the interrogation.

"Dong Jun, our policy is to help everyone to the greatest extent possible."

Rubbing his hands, Wang Zhaokai stood up: "I’ve already given you a chance, but you didn’t cherish it."

With that, he took a transparent evidence bag out of the file bag on the interrogation table.

"Do you know what this is?"

Dong Jun looked up and replied indifferently: "My phone."

"It’s good that you know it’s your phone."

"Do you know whose WiFi your phone was connected to?"

Hm?

Dong Jun hesitated slightly, but before he could speak, Wang Zhaokai raised his voice.

"Dong Jun! Didn’t you say you didn’t know Qin Weiwei well?"

"Not well... yet your phone was able to connect to her WiFi?"

"I..."

Dong Jun was startled but maintained his composure: "I... I was just leeching the internet; I don’t have WiFi at home, and I’m not often at home..."

"Officer, leeching WiFi... that’s not illegal, is it?"

Leeching WiFi is, of course, not illegal.

And just because Dong Jun leeched off Qin Weiwei’s WiFi doesn’t make him a murderer.

"What about this then?"

"At 3:30 AM, you cast a video to Qin Weiwei’s home computer; do you remember what you played?"

Hearing this, Dong Jun’s expression changed instantly.

Wang Zhaokai pressed on.

"But what did you tell the police?"

"You said when you knocked, Qin Weiwei answered that she was watching TV, but it was clearly you playing the movie!"

"If you didn’t kill her, why did you lie?!"

Bang!

Just then, the door of the interrogation room opened.

Wang Zhaokai turned around and saw it was Chen Jiang.

"It’s ready."

With that, Chen Jiang handed over a piece of paper.

Wang Zhaokai glanced at the content on it, and a look of surprise appeared on his face.

Then, he returned to the interrogation table.

Bang!

He slapped the report Chen Jiang handed over onto the table, giving Dong Jun another start.

"Do you know what this is?"

Wang Zhaokai picked up the report on the table again.

"You thought that the words you wrote with soap water on the bathroom mirror at Qin Weiwei’s place would go unnoticed?"

"You!"

This time, Dong Jun truly panicked.

He had done it very secretly, so how did the police discover it?

No way, they couldn’t have found it.

"Impossible! You can’t possibly have found that; it’s invisible!"

Wang Zhaokai sneered: "Dong Jun, if you don’t want anyone to know, then don’t do it."

"This report in my hand compares your handwriting with the writing on the bathroom mirror."

"I don’t need to tell you the conclusion, do I?"

"Tell us! Why did you kill Qin Weiwei!"

The conclusion... naturally didn’t need to be stated.

Dong Jun knew all too well what he had done.

"I...I’ll confess..."

After that, Dong Jun confessed everything about why he killed Qin Weiwei.

As it turned out, the two had known each other for quite some time.

Or rather, Dong Jun recognized her the day Qin Weiwei moved in, but Qin Weiwei didn’t know Dong Jun knew her.

It started five years ago.

"Back then, my son was only four. He was playing on the bridge that day..."

Back then, five years ago, Dong Jun took his son to a water park, and because he went to buy tickets, he left his son on the bridge to wait.

Unexpectedly, an incident occurred, and his son fell off the bridge and drowned.

And at that time, Qin Weiwei was on the bridge.

She even filmed a video when the child was about to fall, but she didn’t stretch out a hand to help.

"If she hadn’t been filming and had just reached out to stop him, my son wouldn’t have died!"

"He wouldn’t have died!"

Although Dong Jun’s son drowned, Qin Weiwei wasn’t punished in any way.

Killing requires imprisonment, but there is no law saying ’standing by and doing nothing’ warrants jail time.

Later, this incident caused Dong Jun’s wife to divorce him.

Despite the deep resentment from the incident back then, Tang Jun hadn’t thought of taking drastic actions.

But over two years ago, by chance, both of them ended up buying apartments directly opposite each other.

"This was fate giving me an opportunity!"

Dong Jun suddenly became agitated.

"You know, when I saw her, I felt it was fate’s way of allowing me to avenge my son."

"The funny thing is, she watched my son fall off the bridge with her own eyes, yet within two years completely forgot about me."

"What does life mean to people like her?"

"Tell me, does she deserve to live in this world anymore?"

"Kill her!"

"I had to kill her to avenge my son!"

"Almost three years! I’ve been planning her murder since three years ago!"

Dong Jun became more and more excited.

A bit hysterically crazy.

Wang Zhaokai sighed, not anticipating that the matter behind all this stemmed from a drowning five years ago.

"So, how did you commit a locked-room murder?"