Extraordinary and improbable as his defence appeared at first to be, the exhumation proved the truth of his assertions.

These revelations, however, drew the eye of justice again on Perregaud and his partner in crime, and this time their guilt was brought home to them.

They were condemned by parliamentary decree to "be hanged by the neck till they were dead, on a gallows erected for that purpose at the cross roads of the Croix-du-Trahoir; their bodies to remain there for twenty-four hours, then to be cut down and brought back to Paris, where they were to be exposed an a gibbet," etc., etc.
It was proved that they had amassed immense fortunes in the exercise of their infamous calling.

The entries in the books seized at their house, though sparse, would have led, if made public, to scandals, involving many in high places; it was therefore judged best to limit the accusation to the two deaths by blood-poisoning of Angelique de Querchi and Charlotte Boullenois..