Texans took advantage of the lack of oversight to agitate for more political freedom, resulting in the Convention of 1832. Among other issues, the convention demanded that U.S. citizens be allowed to immigrate into Texas, and requested independent statehood for the area. The following year, Texians reiterated their demands at the Convention of 1833. After presenting their petition, courier Stephen F. Austin was jailed for the next two years in Mexico City on suspicion of treason. Although Mexico implemented several measures to appease the colonists, President Antonio Lopez de Santa Anna's measures to transform Mexico from a federalist to a centralist state provided an excuse for the Texan colonists to revolt.