Parole officers oversee and monitor individuals who have recently been released from prison. A felon who has been released from prison must follow rules and regulations mandated by the state, court and parole board. Parole officers must keep track of parolees and help keep them in line. They also learn the life and criminal history of the person they oversee. They make planned and surprise visits to the home of past offenders to make sure they are following the conditions of their parole. Parole officers can also use GPS tracking to ensure the parolee doesn't visit locations they are supposed to avoid.