Final answer:
The term that best describes the scenario where Jamie pleads guilty in exchange for time served and therapy is a 'plea bargain.' This is a prevalent practice in the criminal justice system, allowing for leniency in sentencing and certainty of conviction.
Step-by-step explanation:
The scenario presented falls under a process called a plea bargain. This is an agreement in which defendant Jamie would plead guilty to a lesser charge, in this case, stealing a backpack, in exchange for a more lenient punishment, which includes time already served and the promise to undergo therapy. Plea bargaining is a common practice in the criminal justice system where defendants avoid the risk of a trial that could lead to more severe sentencing, while prosecutors achieve a conviction certainty and save resources.