Be glad he's not contacting you. He choked you. Police were called. He was was put in jail over it . I don't know why he is out of jail for attempted strangulation.
Tell your mother exactly what happened, and ask her to block him.
As far as your brothers tell them too. Also tell them not to retaliate against him. Not out of caring, but not to create more drama, and get them in trouble.
However, you ultimately have no control over what they do.
Everyone should know this man attempted murder on you. He needs to be 100% out of your lives.
You're free to do whatever you want, and I need no response about my advice. I sincerely don't need or desire to hear any and all "buts", changes and additions to your story, or any of that ****.
Again, you should be happy, not hurt, he's not contacted you.