On the first day of the school year, a geography teacher was murdered. The police had 4 suspects: the gardener, the math teacher, the coach, and the school principal.
They all had alibis:
β’ The gardener was cutting bushes.
β’ The math teacher was holding a mid-year test.
β’ The coach was playing basketball.
β’ The principal was in his office.
Who is unreliable and therefore your suspect?