M.Dupin knew nothing.

Who indeed amongst the organizers of the _coup d'etat_ would have taken the trouble to make sure of his joining them?
Corrupt M.Dupin?
was it possible?
and, further, to what purpose?
To pay him?
Why?
It would be money wasted when fear alone was enough.

Some connivances are secured before they are sought for.

Cowardice is the old fawner upon felony.

The blood of the law is quickly wiped up.