In fact, there's more than innuendo that your investigation isn't going to be thorough because it isn't going to get reported; that it's going to go to the minister, and the minister isn't likely going to make it public.
En fait, on dit à mots plus ou moins couverts que votre enquête ne sera pas exhaustive parce que vous n'avez pas de rapport à déposer à son issue, que vos constatations seront faites au ministre, qui n'a probablement pas l'intention de les rendre publiques.