Events of Red Dead Redemption 2
Later, Pierre interrupts Lemieux and tells him that Leviticus Cornwall angrily telephoned the mansion and wants the mayor sign some papers. He then leaves and Dutch tells Arthur to follow him. Pierre briefly talks to a Saint Denis policeman name Terapin and tells him to keep an eye on Angelo Bronte.
He then walks back into the mansion and talks with Luca. Luca states that the phone is ringing again and Pierre tells Luca that the Lemieux will sign the papers later. Pierre then berates a maid named Marie for hanging around an area where she should not be and he heads upstairs to Lemieux's office. He then locks up Lemieux's ledger with the documents inside the desk drawer and leaves.
If Henri was allowed to be exposed by Jean Marc by the player, it is unknown if Pierre begins working for Jean Marc or not after the latter becomes the new Mayor.