Alabama has a Stand Your Ground law that allows citizens to defend themselves and others, if they feel that they are in danger. Use of deadly force is allowed if the person feels they are in immediate danger, and believes it's necessary to defend themselves. There is no duty to retreat. Currently certain sections of the Stand Your Ground law are being challenged. Namely a section that allows the use of lethal force in for self defense were the person using self defense, followed or stalked the person who then confronted them. This is due to the shooting of Trayvon Martin on February 26, 2012 in Florida. (2006)
Stand Your Ground Laws are often expansions of the Castle Laws. They address the use of force outside of one's home, place of work, or vehicle. They cover most of the same issues as the castle laws (the places where this law applies, the requirements fro use of deadly force, if there is a duty to retreat, the amount of force that maybe used in defending one's self or others) the main difference is the location. Some states that do not have a technical Stand Your Ground Law have extensive Castle Laws that address locations outside of the home, place of work, etc. The circumstances of the law vary widely from state to state.