My step dad

Very few people know this about me but when my mom first met him my step dad was abusive. My mom met him when I three and broke up with him when I was ten. The first incident happened in the bathroom when I was three. I was told to brush my teeth. I didn't want to because I was a stubborn little kid. My step father got mad so he tried to strangle me my mom walked into the bathroom and screamed. When my mom was with him there was about one incident a week he would hit me so hard that i would fall backwards. He would squeeze me until i couldn't breath for half a second. Pick me up by my ears. In a way i am glad my mom broke up with him cause it made him wake up. He seams to have changed since then but i still can't trust him.