Final answer:
In Twelve Years a Slave, Solomon Northup infers that John Williams ends up as a criminal.
Step-by-step explanation:
In Twelve Years a Slave, Solomon Northup infers that John Williams ends up as a criminal. John Williams is one of the characters in the book who is initially in a position of power but is eventually revealed to be a criminal involved in the kidnapping and enslavement of free Black people. Solomon Northup, the author and protagonist of the book, exposes Williams' true nature.