In 1952, he founded Imprimerie Lacasse at Tecumseh.
Lacasse was named to the Canadian senate at the age of 37 and died in office 25 years later.In 1944, Lacasse was reproved in the rabies fatality of an 11-year-old boy.
Appointed medical health officer and acting as physician to the family, Lacasse did not administer the Pasteur treatment when the boy was bitten by a rabid dog.
A coroner's jury criticized Lacasse for showing "a certain amount of neglect by not administering preventive treatment for rabies when the unknown dog could not be found within 14 days after occurrence of the bite."