But he's only asking for that in the context of a parole hearing which she is entitled to by law. She wasn't sentenced to LWOP, she was sentenced to 60 years. I have to assume that a judge in Indiana knows the laws of Indiana, so he would have known when he set the sentence that she would be entitled to parole half way through that time, (although she seems to have had another couple of years knocked off either for time served before sentencing or for good behaviour).
In other words, if the sentencing judge wanted her to spend 60 years behind bars before her first parole hearing he would have sentenced her to 120 years. He didn't, he sentenced her to 60, presumably in the full knowledge that she would be assessed by a parole board after 30. Victims families always have the right to speak at a parole board hearing, and I think that right becomes a bit meaningless if we say that victims have a right to be heard, but ONLY if they ask for the prisoner to be denied parole. They should be allowed to say whatever they want.
I guess what I'm trying to say is that the due process of the law was followed here. If you don't agree with the decision to release her its the state legislature you should be petitioning to change the law. None of this in any way the fault of the victim's grandson, who has merely exercised his right to speak his mind at a parole hearing for his grandmother's murderer.