Mifsud's 302
What is an FBI 302?
302s are a powerful tool for a prosecutor. Since the witness doesn't generally take notes during an interview, it's the only contemporaneous document capturing what was said. Plus, it's the "official" record of the interview.
https://grandjurytarget.com/2017/05/18/what-is-an-fbi-302-the-problematic-nature-of-fbi-agents-interview-memos/