Possession of a firearm or ammunition by a convicted felon violates Florida Statute § 790.23 and is a second-degree felony carrying up to 15 years in prison and a $10,000 fine — often charged alongside the federal 18 U.S.C. § 922(g) counterpart. Defenses include constructive-possession challenges (proximity alone is not enough), restoration of civil rights or clemency, and search-and-seizure suppression.