Final answer:
Mr. Toussaint was likely arrested for his leadership in resisting oppression, such as the case of Toussaint Louverture during the Haitian Revolution, who was seized by orders of Napoleon Bonaparte.
Step-by-step explanation:
The reason for Mr. Toussaint’s arrest depends on the specific historical context in which he's referenced. If the question refers to Toussaint Louverture, a key figure in the Haitian Revolution, his arrest was orchestrated by Napoleon Bonaparte.
Toussaint was deceived into a meeting where he was seized and transported to France. In France, he was jailed in the Fort de Joux, where he eventually died in 1803. These actions were due to his efforts to secure the liberty of the Haitian people and to resist re-imposition of slavery by the French.