"Professor Rozier?" said Neville and Hermione, almost in unison, as soon as Matthew's words fell.

"That's right!" Matthew nodded.

"No......" Hermione's expression looked a little hesitant, "Professor Rozier...... How could she ......"

Matthew turned his gaze to Neville and began to explain, "Neville, do you remember our second after-school practice of the semester, when the first-year students of our two houses went together to clean Professor Rozier's office on the orders of Mr. Priger. ”

"Of course I remember. Neville nodded, "The two of us, and Evans, the three of us together...... It was also the day Ron was attacked. ”

"You and Evans were out that day, and when I was mopping the floor alone, I found a drop of blood-like liquid under Principal Rozier's desk. Matthew said calmly, "In addition, in the cupboard of Professor Rozier's office, I also vaguely smell the smell of unicorn corpses!"

He recounted everything he had seen and heard in Rozier's office that day.

Hermione and Neville exchanged a glance and muttered, "Unbelievable......"

"It's true. Matthew continued: "And the second attack that happened on the side of the Potions classroom, Principal Rozier also appeared on the scene at the first time!"

Hermione lowered her head and pondered for a moment, "But on Halloween, when the unicorn was attacked and Professor Kettleburn broke into the auditorium, Professor Rozier was at the guest of honor......"

However, Matthew has already made up his mind about this question: "The time of the attack on the unicorn and the time when Professor Kettleburn found the body of the unicorn may not be at the same time." Maybe someone attacked the unicorn first, then returned to the auditorium, and then Professor Kettleburn found the unicorn's body!"

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

Neville, on the other hand, had been persuaded by Matthew for the most part.

"I've always felt that Professor Rozier is suspicious!" he said very seriously, "why did she suppress all the news of these attacks...... Why didn't she cure Ron Weasley of his poison...... Why didn't she put Hogwarts in a state of emergency after so many attacks......"

"I couldn't figure it out before, why she did it, but now I do. Neville continued, "If she's the real culprit in all of this, then it all makes sense!"

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

"But ......" Unfortunately, Miss Granger was still not convinced by him: "Professor Rozier, she's the rector...... She's been at Hogwarts for almost fifty years...... Why would she do that? She doesn't have any reason to attack the students, does she?"

"Who knows. Matthew shrugged his shoulders and returned Hermione's original words, "But, Hermione, you're naïve. You always think that the Headmaster of Hogwarts will be a saint, but all the evidence now shows that Professor Rozier is the most suspicious......"

Hermione looked down, as if lost in thought.

After about half a minute, she looked up again.

"I still think Professor Troka, he's more suspicious!"

She said with a serious face.

......

Matthew felt a little dizzy.

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

Miss Hermione Granger, however, seemed to be a little more stubborn than he thought.

"Let's split up!" Neville decided, "Professor Troka and Professor Rozier, both of whom are very suspicious...... Alright, Hermione, you're going to keep up with Professor Troka, and I'm going to be with Professor Rozier...... We'll be able to catch the horses they left behind!"

At Neville's words, Matthew only felt his head grow bigger.

Hermione Granger, a clever little girl, if she really found out something and made it public, it might have an impact on the whole situation.

You have to stop them from doing this!

Neville's gaze looked at Hermione, "Hermione, if you accidentally get caught by the teacher while tracking, try to put all the blame on me." Just say I made you do that!"

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

His expression was very serious, and he didn't look joking at all: "...... Matthew, I know, you're a good law-abiding kid who doesn't want to break school rules...... Unlike us, Hermione and I were both born with adventurous hearts. But it doesn't matter, the task of investigation will be left to Hermione and me, even if the teacher finds out when the time comes, we will definitely not confess you!Besides, thank you very much for providing us with such important information. ”

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

"And what are you going to do, Neville?" asked Hermione in a whisper.

Matthew and Hermione's eyes couldn't help but focus on Neville Longbottom at this time.

Neville smiled and said, "Don't worry about me, my parents are more or less related to the Ministry of Magic. Even if the East Window incident happens, I won't be expelled, and I'll be locked up for a few more days at most...... ”

“...... Actually, I'm used to it. He lowered his head and looked at the marks of the shackles on his wrists: "And after all, you are all from Muggle families, and you will definitely be punished more severely than me...... My body is stronger than yours. All in all, whatever happens, just put all the blame on me!"

The other party has said this kind of thing, and Matthew feels that if he shirks it again, he will really be a bit "inappropriate".

"Neville, leave the task of tracking down Professor Troka to me. Matthew replied calmly.

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

"I'm the most popular student in Professor Troca's Transfiguration class...... It was the safest option for me to contact him. Matthew continued, "You two should go after Headmaster Rozier, and be careful, for I am sure your task will be even more difficult than mine!"

Neville gave Matthew a grateful look, then grabbed his hand.

"Let's work together to catch the real murderer!" he said with great determination.

"That's right!" Hermione stepped in.