ATLANTA — Like any parent or teacher,T.I. probably couldn't name which one of the "Road to Redemption" kids is his favorite.

Undoubtedly, though, one of the most successful youth interventions T.I. helped lead was the one in chapter 3, titled "Your Environment Does Not Define You." Anthony, a California teenager, was a member of the Crips gang and a fledgling chef. In the episode, Tip called the case "far more extreme" than the previous interventions, because Anthony's behavior was influenced by previous generations of family members who were also gangbangers.

Anthony eventually turned his life around following his introduction to Tip. He's now tending to his pregnant girlfriend and working for a notable chef. His probation officer, Kimberly McKinney, has noticed the impact T.I. has had on Anthony.

The change has been so significant, in fact, that she wrote a letter to T.I. that was read in the courtroom by the rapper's lawyer on Friday. Tip didn't know about the gesture, as McKinney mailed the note directly to his lawyer. The first time T.I. actually heard the letter was during his sentencing.

"I am the probation officer of Anthony, and he is an awesome young man with a brighter future because you have made a tremendous impact on his life," the letter, obtained by MTV News, reads. "For that I thank you, and for the youth without a voice I also speak for them, thank you. Your program was very enlightening and once you started tuning in you could not tune out. My entire caseload, the youth at my church and in my community, friends and family watched faithfully. If I had to select two words that I heard most often describing the program, it would be: life changing."

McKinney noted that "Road to Redemption" helped encourage at-risk youth to pull their lives together and sparked hope in kids committed to changing their behavior. The Harbor City, California, probation officer wrote that she hoped Tip would continue his work. She noted that to help someone change their life, a person must first start with oneself, and "it is obvious that [T.I.'s] change has come."

MTV News will have more from T.I. in the coming days, including Sway's exclusive interview with the rapper. Don't miss "T.I.'s Road to Redemption: The Reckoning," airing Tuesday at 9 p.m. ET/PT on MTV.