In 2003, he filed a police complaint alleging that fellow Vision Montreal councillor Ivon Le Duc had attacked him during a heated borough council debate over a proposed move of the Jean-Paul Riopelle sculpture La Joute.
[4] Dompierre ran for the redistributed Louis-Riel division in the 2005 municipal election and was narrowly re-elected over fellow councillor Nicolas Tétrault.
The electoral office initially showed Tétrault elected by twelve votes, but a more thorough scrutiny confirmed Dompierre as the winner.
[5] The following year, Dompierre was the only VM councillor to support an unsuccessful plan to rename Montreal's Park Avenue and Bleury Street area after former Quebec premier Robert Bourassa.
[7] Dompierre ran as a Liberal Party candidate in the 2003 Quebec provincial election in the east-end Montreal division of Hochelaga-Maisonneuve.