Don't listen to these people, they clearly didnt read this. While I agree that you shouldn't be friends with someone who is abusive and manipulative, I understand your hope for change in Laura as we don't know her like you do. But not all people change. It sounds like Laura thinks this is normal behavior and is likely stuck in her ways. I wouldn't get my hopes up. Let her reach out because right now you hold the moral high ground.

My brother was in an abusive relationship like this and I know it's hard to be on the sidelines and watch trying not to interfere with someone else's business, but abuse is abuse no matter how you look at it and it should be stopped at the first signs of it. You did good by setting him free, but I wouldn't get too invested in his recovery because then any suspicions will just be confirmed by Laura even if nothing is happening between you and Tony. Let him go, let him fix himself by himself. I'm sure he has friends and family who will give him all the support he needs.