I'm researching for a biopic that I want to write, about a famous singer. A film was made about this person, several decades ago; however, it was: poorly scripted, not well researched and the acting also left loads to be desired. Also my sources for the bio are coming from various media: online, video, audio - interviews and recordings, books (incl. an autobiography) I even know someone that saw the singer perform. I'm really big into research and writing notes. What are the legal issues that I should be aware of connected with a script of this nature.