Why is Solomon northup afraid to disclose his status as a free man?

Solomon Northup is afraid to disclose his status as a free man because he fears that revealing his identity could lead to his capture and enslavement. During his time in captivity, he recognizes the dangers of being a free Black man in a society where such individuals are often viewed with suspicion and hostility. Additionally, he understands that his Word alone may not be enough to convince others of his freedom, putting him at further risk. This fear drives him to navigate his situation cautiously while seeking a way to regain his freedom.