"Professor Rozier?" As soon as Matthew finished speaking, Neville and Hermione shouted almost in unison.

"That's right!" Matthew nodded.

"No..." Hermione's expression looked a little hesitant: "Professor Rozier...how could she be..."

Matthew turned his eyes to Neville and began to explain: "Neville, do you remember our second after-class practice this semester, when the first-year students of our two colleges went to clean Professor Rozier's office at the order of Mr. Pringer."

"Of course I remember." Neville nodded: "The two of us, Evans, and the three of us... that day was also the day when Ron was attacked."

"You and Evans went out that day. When I was mopping the floor alone with a mop, I found a drop of bloody liquid under Principal Rozier's desk." Matthew said calmly: "In addition, in the cabinet of Professor Rozier's office, I also vaguely smelled the corpse of a unicorn!"

He didn't say in detail all the experiences he had seen in Rozier's office that day.

Hermione and Neville looked at each other and murmured: "Incredible..."

"It's true." Matthew continued: "And the second attack in the Potions Class classroom, Principal Rozier also appeared at the scene at the first moment!"

Hermione lowered her head and thought for a moment: "But on Halloween, when the unicorn was attacked and Professor Keitelborn broke into the auditorium, Professor Rozier was in the guest seat..."

However, Matthew was already confident in this issue: "The time when attacking the unicorn was discovered and the time when Professor Kettleborn discovered the unicorn's corpse may not be at the same time. Maybe someone attacked the unicorn first, then returned to the auditorium, and then Professor Kettleborn discovered the unicorn's corpse!"

The expression on Hermione's face still looked a little hesitant.

However, Neville was already convinced by Matthew at this time.

"I always felt that Professor Rozier was suspicious!" He said seriously: "Why did she suppress all the news of these attacks... Why didn't she give Ron Weasley a cure for poison on him... Why did she still not let Hogwarts enter a state of emergency after so many attacks..."

"I couldn't figure it out before, and didn't understand why she did this, now I understand." Neville continued: "If she is the real culprit of all this, then it makes sense!"

Looking at Neville's expression, Matthew nodded with satisfaction.

"But..." Unfortunately, Miss Granger was still not convinced by him: "Professor Rozier, she is the principal... She has been in Hogwarts for almost fifty years... Why did she do this? She has no reason to attack the students, right?"

"Who knows." Matthew shrugged and returned the original sentence of Hermione: "But, Hermione, you are too naive. You always think that the vice-chancellor of Hogwarts will be a saint, but all the evidence now shows that Professor Rozier is the most suspicious..."

Hermione lowered her head, as if she was in thought.

About half a minute later, she raised her head again.

"I still think Professor Troca is more suspicious!"

She said seriously.

...

Matthew felt a little dizzy.

The reason why he wanted to express what he knew about Professor Rozier was to attract the attention of these two friends and prevent them from paying too much attention to Professor Troca's affairs.

However, Miss Hermione Granger seemed to be more stubborn than he thought.

"Let's take action separately!" Neville decided: "Professor Troca and Professor Rozier are both very suspicious... This is OK, Hermione, you are responsible for stalking Professor Troca; and I are responsible for stalking Professor Rozier... We will definitely be able to catch the foot they left behind!"

As soon as he heard Neville's words, Matthew only felt that he was even more overwhelmed.

If a smart little girl like Hermione Granger really discovers something and makes it public, it may have an impact on the overall situation.

You must stop them from doing this!

Neville looked at Hermione: "Hermione, if you are accidentally caught by the teacher when you are tracking, try to push all the responsibilities to me. Just say that I asked you to do this!"

"And you, Matthew..." Neville's eyes turned to Matthew himself again.

His expression was very serious, without any jokes: "...Matthew, I know that you are a good kid who abides by the law and is unwilling to violate school rules... Unlike us, Hermione and I are born with a risky heart. But it doesn't matter, let me and Hermione and I leave the investigation task to me. Even if the teacher discovers it during the stalking, we will never give you it! In addition, thank you very much for providing us with such important information."

Suddenly being called a "good boy" by Neville, Matthew was a little "flattered".

"What do you do, Neville?" Hermione asked in a low voice.

Matthew and Hermione's eyes were at this time focused on Neville Longbottom.

Neville smiled and said, "Don't worry about me, my parents are more or less in the Ministry of Magic. Even if the matter is revealed, I will not be fired. At most, I will be detained for a few more days in the confinement..."

"... Actually, I'm used to it." He lowered his head and looked at the traces of shackles on his wrists: "After all, you are from a Muggle family, and the punishment you accept must be more severe than me... My body is stronger than you. In short, no matter what happens, just put all the blame on me!"

The other party said this, and Matthew felt that if he rudes it, he would be a little "unbearable".

"Navi, leave it to me for the task of tracking Professor Troca." Matthew replied calmly.

"Matthew?" Neville and Hermione looked at him in surprise.

"I am the most popular student in the Transformation Class of Professor Troca... It is the safest choice for me to contact him." Matthew continued: "You two should follow Principal Rozier; be careful, because I believe that your task will definitely be more difficult than mine!"

Neville glanced at Matthew with some gratitude, and then grabbed his hand.

"Let's act together and capture the real murderer behind the scenes!" he said with great firmness.

"That's right!" Hermione also came over.
Chapter completed!