You spent most of your life in prison. It is up to you to decide whether you were convicted fairly or unfairly and how you feel about it. You also need to decide if you were released or if you escaped.
If you escaped you need to decide if anyone is looking for you.
Skill Proficiencies: Insight or Intimidate
Equipment
Shabby clothes. Pack with bedroll. Dagger. Simple pouch with 1sp
Feature: Endure Hardship
Suffer the effects of Exhaustion as if you had one less level.
Characteristics
Prisoners are often quiet and taciturn. They dislike discussing their time in the dungeons, even when it is public knowledge.