Rachel picked up Conan by his shirt collar. "Sorry if Conan gets in the way… he loves mysteries; he actually comes to murder cases with my dad, Richard Moore."
The teens were too frightened to comment.
They went to the last place Yumi was, the science lab.
Rachel called her father when she thought he was sober.
About a half an hour later, Richard and the inspector of the French police came to the scene.
"When was the last time you saw…?" Richard asked Ulrich.
"Her name is Yumi, sir. It was about an hour and a half ago. She left for gym class, from science class." Ulrich answered. The Inspector then asked, "Were any of you there at the time?"
Everyone shook their heads. As normal Conan walked around the area. He opened the door and walked out. 'Huh? What's this?'
Richard saw Conan crawling around. He got annoyed (again.)
He grabbed Conan and yelled, "You runt, stay out of the way!"
"But Richard, look. There are skid marks." Conan said covering his head.
"Huh?" Richard muttered.
"As annoying as you are Conan, you're pretty good at finding clues. I wonder why." Richard whispered
"Oh, I just read a lot of mysteries and follow around the best detective in the world." Conan lied.
The Inspector looked at the markings in the floor. "These markings were made of the rubber soles of boots. Tell me, do you have friends that wear boots?"
"Two, one's Yumi." Jeremie answered.
"Does she have anyone who hates her intensely?" Richard asked.
They all thought for a second. "Well... there's this girl Sisi, well I don't know if hate's the word, but she has a rivalry with Yumi." Aleita said.
"Really?" Richard asked.
"Yeah, but why do I doubt it?" Ulrich said.
Conan walked into the hall. There he saw some form of crack in the wall.
He walked to it and found he can fit his fingers in it. Conan then pulled.
Everyone in the room heard a scraping noise.
Rachel saw Conan. "What are you doing? You're going to hurt yourself."
Jeremie chuckled. Odd then said, "Trust us, he's safe. There are secret passages all over the place."
"That's right," Alieta said, "They were made in World War II, to allow people to escape the Nazi invasion.
"Maybe we can get finger prints." Richard stated. "Fresh out of powder." The inspector said.
"Not quite," Jeremie said, "There's a way to make a simple version of it. All we need is a balloon, a lit candle, a sink, and a living person."
Ulrich ran upstairs then about a minute or two later he got the nonliving materials.
They walked into the science lab and filled the balloon half way with water. Then Jeremie blew in it and filled the remaining space with air.
While he was doing this, Odd lit a match and put the flame on the wick of the candle. He shook the match out. Alieta put the balloon over the flame. A little while later, a black powder formed.
"I think that'll be enough." Alieta said, taking the balloon from the candle.
Richard got a brush and took some of the dust and wiped it on the door. Fingerprints did show up.
Richard then persuaded the nurse to have medical records the students.
They went through half of them. Everyone got annoyed. Except Conan. Jeremie looked at Conan with suspension, as did the other Lyoko warriors.
Conan finally stopped.
"Guys I found something!" Conan yelled to get Rachel's and Richard's attention.
The finger prints the found matched only one student.
Yumi.