"Today, a girl named Jane was found dead on the first day of school in the girl's bathroom. She was found by another students. Who says that Jane had been upset the whole day." Says a reporter to the microphone. "Suspects are currently being interviewed."

"I was cleaning the toilets! I believe in peace, and I would never do such a thing!" Exclaims the janitor.

"I was busy marking midterm papers. Oh, I loved Jane deeply, but I would never harm a fly! I swear!" Said the physics teacher.

"I was in the staff kitchen preparing a cup of coffee for myself. I never knew her." The principle said.

"I was teaching. I have a whole class of alibis." The English teacher said.

Who killed Jane?