Solve the riddle for brainiest riddle im not the sun nor the moon im not a ghost nor the stars but i am however apart of your heart wwhat am i??? On the first day of the school a young girl was found murdered. Police suspect four male teachers and question them. They were asked what they were doing at 8:00 am.

Mr. Walter: I was driving to school and I was late.
Mr. Thomas: I was checking English exam papers.
Mr. Benjamin: I was reading the newspaper.
Mr. Calvin: I was with my wife in my office.