If you knew your friend’s man was bad news would you tell her?

My friend is dating a man that I once dated in the past. She doesn’t know he is my ex, and we broke up because he was violent and physically assaulted me. He brings me so many bad memories and PTSD. I remember the times he bruised me and times he even broke my bones, and choked me. He had me in a vicious cycle of abuse. Then we broke up and he disappeared but years after he is now dating my friend. We went out for dinner after she insisted and he actually cornered me & told me things have changed & he is sorry & that he is a different man blah blah. I told him that idc but he shouldn’t be with my friend cause he is messed up. I would love to tell my friend but I don’t want to be accused of sabotage or jealousy.
If you knew your friend’s man was bad news would you tell her?
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