Final answer:
The Louisiana Supreme Court ruled that indigent defendants may have a right to a private investigator under certain circumstances in the case of State v. Madison.
Step-by-step explanation:
In State v. Madison, the Louisiana Supreme Court ruled that under certain circumstances, an indigent defendant may have a right to a private investigator to aid in their defense. This means that the court acknowledged the situation where a legally appointed defense attorney struggles to gather necessary information for a defense due to the lack of resources, which in turn could hinder the right to a fair trial. Thus, the correct option regarding the ruling in State v. Madison about the right to a private investigator for indigent defendants is: 3) The Louisiana Supreme Court ruled that indigent defendants may have a right to a private investigator under certain circumstances.