doesn't pass the smell test

Pope Francis Denies He Knew of Abuse by McCarrick - The New York Times 

doesn't pass the smell test.

kid holding his nose from bad odor, isolated on white | Flickr 

public domain

a complete investigation is needed by an independent source(s).
the result(s) of the investigation(s) needs to be made public.
let the chips fall where they may. 

What is the origin of the phrase 'let the chips fall where they may'? - Quora