What can happen if I forgive my felon husband and get back to him with my son even he was convicted of domestic violence against me and our son?

Please I need your opinion and advice on my matter so I can decide what to do with my life. Use to live in Miami Florida with my husband. I have a son he is 6 years old. I was a victim of abuse along with my son who was back then 3 years old. My husband still living in Florida. Now I live with my son in my home country Morocco 4 years now. My husband asking me to give him a chance and get back together and raise our son together. He did change a lot after his father's death. I believe him. I want to get back again as family. He wants to reapply for me at the immigration after I lost my status. My question please can he reapply for me and get back to US through our marriage even we are separated since 4 years since the abuse or his criminal records will affect his willing to petition for me at the USCIS. My son he is American citizen. Please tell me so I can know what way to take. Can my husband still petition for me? Please help me and is there any danger for my son getting back with his father by taking him away from me by law.