The decision on how to treat an inmate is up to the board of pardons and parole; and they can look at other convictions in one's past.
Attorney Bonanno's answers to questions are for general purposes only and do not establish an attorney-client relationship. You should carefully consider advice from an attorney hired and who has all facts necessary to properly advise a client, which is why these answers to questions are for general purposes only and do not establish an attorney-client relationship.
You have two options. 1). Pursue sentence review. It can be explained to you in prison by your counselor. Getting a sentence reduced through the Sentence Review Panel is very difficult and can lead to a greater sentence being imposed if the judges determine the sentence you agreed to was too lenient. 2). Hire an attorney to attempt to get the state to agree to a sentence modification. Also, very difficult. Sentence modification requires the prosecutor's consent if the sentence exceed three years and most prosecutors are unwilling to revisit old convictions. That being said, I personally have succeeded in getting sentences modified and I know of other attorneys who have as well.