All investigations start out as a hunch, and/or a conspiracy theory based upon a puzzle that needs to be thought about carefully as it's picture starts to become clearer and more clearer.... Once the pieces begin to match, the conspiracy or hunch then turns into a fact finding mission that many times ends with convictions.
What is the name of the accountant who died in 2019? Did he die in a hospital or under a doctor's care? Did he die in an accident? Was there an autopsy?