I worry about my toxic ex

A few years ago I dated someone that has been hurting his entire life. His bio father is dead (drugs) and his mother cradles him but is also really mean. He was crazy insecure and bipolar throughout our relationship. He has severe anger issues and would pick fights over nothing and call me names and make me out to be a monster and then apologize and we’d kiss and make up. He convinced me to lose my virginity to him even though I wanted to wait until marriage. He spit on me. He was so awful to me he would stand over me and scream and anyways.. we’ve been broken up for a while and yet, I still worry about his well being. Since breaking up he’s hurt other girls (who have come to me) and has been arrested twice, the last time being just a month ago. I spoke to him 3 months ago about so many things including religion and his issues and he told me he was seeing a therapist and what not. But now he’s gone ghost from the internet and his phone appears to be off and I’m worried. It’s so dumb because of how he treated me but I just want to check in on him.