Tell me. What is the logic of a detective working backwards from the solution?
You show up to a crime scene and your chief tells you it's a suicide. Your department requires that it's a suicide. People's jobs are on the line if it's not a suicide, including your own.
But you find clear forensic evidence that it's a homicide. In fact, you find experts examining the evidence who agree that it's a homicide. Do you ignore it? Do you ignore unfavorable evidence or rationalize it with the supernatural? Or do you just call it what it is?
Do you believe in blind faith?