Step 1 : Introduction to the question "Who actually framed Roger Rabbit?"
...The film depicts a world where human beings directly interact with cartoon characters. It stars Bob Hoskins as a private detective who has to investigation a murder involving Roger Rabbit, a famous cartoon character. What follows is a wild ride through Toon Town where a whole host of cartoon characters become entangled in the murder investigation. When it finally wraps up and all the loose ends are secure, the one suspect left standing is Judge Doom. He's the villain who actually framed Roger Rabbit. Source: RogerRabbit.Fandom.com