Quick definition to get on the same page: "stand-your-ground law states that a person may justifiably use force in self-defense without an obligation to retreat first" (wikipedia)
This question is interesting because of Mill's ideas on Liberty and the government's limitations. One of the questions that I feel will need to be answered is: Does the government have the right to impose an obligation to retreat?
Mill's utilitarian views are also interesting because objectively their is a lot of unhappiness that has come from having or not having the law. In states without the law people may have been killed who could have survived, in states with the law people have been killed who could have survived had the other person retreated, etc. While both of those statements may be debate (don't) the important part is that there is a lot of unhappiness surrounding the laws.
Also I know that King would argue that a law that discriminates is inherently an immoral law. Does Mill have any reservations about discriminatory law? (please assume it is discriminatory)
Edit: Removed several pleas to remain civil basically equating to: this is not a debate on stand-your-ground laws. Thanks @iphigenie