Answer:
Obtain the permission of the Parole Board to ensure that no negative consequences will happen to those who decline to take part, and who return to prison
Step-by-step explanation:
In any study working with a potentially vulnerable group, which former prisoners now on parole would fit since they are at higher risk for returning to prison or committing crimes, it's important to make sure the participants would not be affected in any significant way by the study. This can be done with the help of the Parole Board, which can provide a way to contact the subjects, guidelines on how to work with them, or even authorize or deny the study. So, one of the first steps would be to speak with the Parole Board to obtain permission and see how accessible the subjects are.