"Got it! Let's go! Yixue ran from a distance, excitedly holding the key and said.

The three of them reached the top of the building, and in front of them was a door that was locked by a simple chain.

Yi Xue flashed the key, and said fluently with the lock: "This is the tallest building in the school, so the view should also be the best place." ”

After the door opened, everyone walked to a place about 1 meter away from the guardrail and began to look into the distance of the school. In the evening sunset, the clouds in the sky like waves fluttered gently with the breeze. Although it is already at a high place, you can still vaguely feel the fragrance of those exotic flowers and plants in the nearby botanical garden.

"Wow, the scenery is really nice!" Tang Sen said excitedly.

"Indeed, very chic! And the wind on the roof is very strong, and it feels cool and comfortable! The point is that the floor on the roof is still so clean! Lloyd also said.

"Haha, it looks like we didn't come in vain!" Yixue also said happily.

"The sunset is still beautiful, and we've been shopping for hours. Let me see what's on the east side, the area we've just walked into? Lloyd said.

"Townsen! Yixue! Come here! Lloyd shouted aloud and suddenly, solemnly.

When Tang Sen and Yixue came over, they were surprised to find a female corpse hanged on the stairs of the cistern. And this female corpse turned out to be Jona!

The bottom of the cistern is devoid of any murder weapons or debris that could have fallen from the murderer, and the ground is very clean.

"Oh! No! Yixue collapsed and sat on the ground, "How come!?" ”

"Call the police! Don't spoil the scene! Lloyd said cautiously and watched the situation.

"Good!" Townsend immediately took out his mobile phone and called the police.

Before the police arrived, Townsend and Lloyd took a closer look at the scene, and Jona's body appeared to show no signs of a struggle, and her clothes were intact, but it could be seen that the deceased was still struggling before dying.

Stay overnight at the police station

Since the three young men were the first witnesses, they were all left at the police station that night to record their respective statements. After comparison, the three confessions were consistent. After a night, all three were not suspected and were released.

The three of them looked into the distance on the playground and were silent......

"Do you think it was suicide or homicide?" Townsend asked.

"No one is going to lock the door on the premise of committing suicide. As far as the lock at the door is concerned, it is a clue, and the person with the key will be the direct suspect, and in this way, Uncle Zhang is the most suspicious? So the result given by the police today is that he killed? Lloyd thought about it.

"I heard that it has been closely investigated last night, but the police have not announced it for the time being." Yixue said.

"Yesterday you said that the only person who has the key is Uncle Zhang in the security room?" Lloyd asked again.

"Well, the locked door keys of the whole school are all in his place, and the key to the top of the building is known to be one, so no one can go up, yesterday it was me and Uncle Zhang who explained our situation, saying that you are VIPs, it is rare to come here, and they are all adults, they will pay attention to safety, and they finally got the key." Yixue said.

"But this week we've been here, Joanna has always been a very cheerful person, and the three of us are all proficient in the observation of expressions and the understanding of language, how can we not see if there is a problem!?" Tang Sen said in confusion.

"And Uncle Zhang is one-armed, it is impossible to have the ability to strangle people, and he is so old." Townsend squeezed his proudest biceps, and continued playfully.

The police also interrogated him, because he lived alone in a small room of less than 10 square meters at the back of the school, he had no way to prove his alibi, but the police also ruled out the possibility of his motives and body committing the crime. And although the key is his, the murderer does have various ways to easily make a new key, and the police think so. Lloyd said.

"Well, the second one to get the key is ...... Yixue? Tang Sen said in a tangled voice.

"Hey, don't say I'm okay! I was with you all day yesterday! Yixue said excitedly.

"Relax, Yixue, I'm just talking about it......" Tang Sen comforted in panic.

"Can you just talk about this? Do you know what the police asked me last night?! Scare the hell out of me! And such a thing itself is also terrible! Yixue said angrily.

"Could that be the strange man on the phone?" Lloyd asked.

"Quite possibly!" Yixue said. "But the murderer wouldn't be stupid enough to make a phone call and keep a record, right? I'll check it out. Hold on. Townsend took out the phone and dialed out.

Not for a while. Tang Sen came over darkly and said, "Sure enough, it was from a public phone." ”

"Then the clue is broken again." Yixue said.

"Not necessarily. Remember what I said yesterday on the rooftop? The ground is very clean, which means that the murderer knows the terrain very well and has deliberately cleaned it, which is an important clue. Yixue, if I'm not mistaken, the roof is locked, and no one else usually goes up, so the roof should be dusty and slightly dirty, so do you know how often the roof is cleaned? Lloyd asked.

"Ah...... I think about it, it seems that it is only once in 4 to 5 months, and it is cleaned by Uncle Zhang, because the school also knows that he is not in good health, and the roof is not usually used much, so it is only cleaned once for a long time. Yixue said thoughtfully.

"That's a bit of an eyebrow." Townsend said to Lloyd.

"It seems that the murderer has put a lot of effort into not leaving footprints on the roof!" Lloyd said.

Look for clues

"In this way, if the murderer walks around the street with a broom and walks out of the school gate, at least the school police will know." Townsend said. "Then I'll ask the school police." Townsend rushed to the school gate, and after careful questioning and confirmation, there were no suspicious outsiders entering and leaving yesterday. And no students or faculty members left with anything.

"In this way, it looks like the broom that the murderer touched is still in the school!" Townsend said excitedly.

"That's right, but which broom sweeps over the roof? Could the killer have put the broom in a class, or left it in some hard-to-find corner of the school, or was taken out of the school at some point?" Yixue said.

"Indeed, you are right, although it is difficult, but fortunately, this is at school, everyone will help, and they will actively follow the order!" Lloyd said. "Hurry up, Yixue will go to the radio station to inform, Tang Sen will go to the guard office to block the entrance and exit of the whole school, and I will go to the principal's office."

"Okay!" Tang Sen and Yixue said.