Grandparents Raising Children Support Group
This community is dedicated to grandparents who are the primary caregivers of their grandchildren. In cases where the parents are not willing or able to provide adequate care for their children, grandparents may take on the role of primary caregivers. Join the support group to find support, share your experience, and get advice from other members.
If he is released, I don't think it would help to tell your grandson anything. He wouldn't even know who to be on the lookout for.
My instinct is that you'll have to be extra vigilant for a while until you get a sense of where the bio's head is.
In our situation we have a permanent civil restraining order, he has to go to court and petition for any contact, likely never. Again that's only as good as the paper etc. etc. We actually picked up and moved about 40 miles away and updated our info with the court. That is all we were required to do.
I'm so sorry, it is so stressful and scary. The good news is they usually don't stay out of jail for long.
Then if he shows up all you have to do is call the police.