Sheriff Uncle, open the door quickly! I've come to solve a case!

There was a lock on the door with the same rust as an iron door, because no one had ever been to the top floor to ensure that the scene was not disturbed.

The current state is exactly the same as when the crime occurred.

A female student went alone to the locked rooftop on a school morning, curled up inside, and jumped off.

Of course not.

I looked down and carefully inspected the lock; there were no signs of tampering.

Just then, the bell rang, signaling the end of get out of class, and the students were playing around in the hallway.

Several female classmates came over to peek at them and whispered among themselves.

"So handsome!"

"You're so tall and have such a great figure!"

"Hey, you little classmate over there," Li Kuchong and the others winked, "come over here for a second."

Several female classmates shyly pushed and shoved each other, and it took them a while to come over.

Qin Qingzhou remained expressionless, her face stern as she asked, "Who has the key to this lock?"

The female students shuddered in fright, some saying, "I think he's probably a security guard..."

"You scared the children." Li Ku pushed Qin Qingzhou aside with a look of disdain, then put on a practiced smile and faced the little girls: "Normally, people don't come here, do they?"

The girl in the lead shook her head: "No, the teachers are afraid something might happen to us, so this place is always locked."

"Okay, thank you."

"You're welcome..." The girls blushed and ran away playfully.

Qin Qingzhou didn't need to say anything; Li Ku had been working with him for so long, he knew exactly what to do.

He took out his phone and contacted the school. He quickly got in touch with the so-called security guard. Not long after, a man who looked to be about thirty-five years old, wearing a security guard uniform, came running up, panting heavily.

He said apologetically, panting, "I'm so sorry, the key to this rooftop has been lost for a long time. I only have this one, and once it's gone, no one else will have it."

Qin Qingzhou frowned: "When did it disappear?"

"It's been a while. I kept that key in the security room by myself. It was a small one, and I didn't pay much attention to it. I don't know when it went missing."

"It might have been accidentally knocked off, or perhaps some mischievous student destroyed it."

Li Ku scratched his head in frustration: "This is troublesome."

Qin Qingzhou's gaze fell indifferently on the security guard: "Where were you at nine o'clock on the night of the incident?"

The security guard answered quickly: "I was on duty at the guard booth that night; it's been my job all week."

There's no objection to that; we'll find out if he's telling the truth by checking the surveillance footage at the school gate later.

Was anything unusual at school that night?

The security guard looked a little embarrassed and chuckled awkwardly, "To be honest, I was actually asleep."

Tsk.

Qin Qingzhou made a soft sound, sounding rather annoyed, turned around, and casually picked up a wooden broom that was piled up in the corner.

This action startled both the security guard and Li Ku. The security guard retreated in fright, while Li Ku stood directly in front of him.

"Captain Qin, don't do anything reckless! We can't use excessive force right now!"

Qin Qingzhou rolled her eyes at him, her gaze seeming to say, "Are you stupid?"

He inserted the handle of the wooden broom into the lock, braced his other hand against the door, and forcefully pried open the lock.

He didn't even breathe throughout the entire process.

The padlock lay pitifully on the ground, rust and ash scattered everywhere.

Pushing open the door, a gentle breeze, unique to the rooftop, drifted out.

Li coughed, his tone stiff: "Haha. You should have said you were opening the door earlier. Brother, you should go back to work."

It hadn't rained for a long time, so the rooftop floor was very dry, and even the moss in the corners of the walls was cracked.

Qin Qingzhou walked in with his arms crossed, stood at the very edge and looked down, right where Xu Shuang had fallen.

Colleagues who were conducting on-site investigations arrived quickly, and one of them detected traces of blood near the edge of the site.

"The bloodstains have been cleaned up. Luminol detected the traces, which are roughly located in this area. The blood is in the form of small, speckled splatters, which is the result of being hit by an object."

Qin Qingzhou squatted down to examine it; the bloodstains were less than a meter from the edge.

He murmured, "In other words, Xu Shuang was most likely injured by someone deliberately while she was standing here. That person pushed her off the building to cover up their crime, and the wound was hidden in the fall injury."

As expected, Xu Shuang did not commit suicide.

"Where's the weapon?" Qin Qingzhou asked.

"It hasn't been found yet."

Qin Qingzhou stood up and looked around.

Besides the murder weapon, there is another crucial item that has not been found.

That's Xu Shuang's phone.

She communicated with that so-called friend online; once the phone is found, the mystery will naturally be solved.

Qin Qingzhou chuckled softly.

It seems it's time to seek help from some little fairy.