Power
With your help, an offender can turn their entire life around. You're meeting them at a pivotal moment, and what they do with this second chance they have been given will determine their future. It can feel pretty powerful to hold that kind of influence over another person, but it's also stressful.
Most of the time, people don't get into this career to feel powerful over another human being. Instead, they get into it because it's a way of contributing to society. It's like being a social worker, detective, and police officer rolled up in one.
You do have a say when it comes to a parolee's future. A bad report or testimony at a parole board meeting can send them back to prison. Parole officers use their judgment and intuition. If there's something shady going on, they have to investigate. Trench coat and oversized magnifying glass not required.