Since the tragic shooting death of Trayvon Martin, Florida's Stand Your Ground law has come under intense scrutiny. Florida governor Rick Scott is presently forming a task force to reexamine that state's law. Critics argue that such laws have led to shootouts over petty disputes and have hampered police investigations with a sweeping grant of legal immunity. Supporters of the Stand Your Ground law say it does not apply to the Martin case and that such laws merely protect those who use a firearm in self-defense from prosecution and financially ruinous litigation. Massad Ayoob is a firearms trainer and author of "In the Gravest Extreme." He spoke at the Cato Institute April 23, 2012.