AITA for letting my friend’s boyfriend get fired? &

I (28F) haven’t spoken to my best friend (28F) since her then-boyfriend sexually harassed me over a year ago. <br><br>She and I became friends about six years ago when we both worked at a marketing firm. She was an intern, I was a copywriter and she needed help completing her assignments. I helped her a lot during her internship, especially with the company’s final project and when she was hired full-time, her senior colleagues assumed I had contributed significantly to her work. I didn’t bother correcting them because it didn’t really matter. I had been working there for years and was well-liked by senior management.<br><br>She moved on from the company a couple of years ago, and I stayed. I was promoted to senior copywriter last year, but she became a brand manager somewhere else. I quit my job in January this year to join my current company as a marketing manager. It’s a tech firm, and I was given a very good salary and benefits. I liked the work as well, so I decided to stay, and renewed my contract last month. <br><br>My friend and I became distant after her boyfriend’s incident, and we haven’t spoken for over a year. Until a few weeks ago. She messaged me out of nowhere and apologized for what happened. I ignored her, but she kept messaging, and calling me. I eventually talked to her, and she said she’d been wanting to contact me for a long time but was afraid and didn’t know what to say. She said she hoped I could forgive her. I told her it was fine, and we talked for a little. <br><br>She then told me she’d broken up with her boyfriend, and she missed us being friends. I told her I forgave her and was also excited to catch up. <br><br>A couple of days later, she called me and said she was going to stay with me for a few nights. I agreed, and we had a lot of fun during her visit. However, on the last night of her stay, I saw something that made me change my mind. I was taking a late-night walk (it helps me sleep). <br><br>I was walking down the street, and saw a young woman (probably in her early 20s) walking ahead of me. A man approached her, and I recognized him. It was my friend’s ex-boyfriend. I had only met him once (he harassed me the same night), but I was sure it was him. I immediately felt uneasy, and watched as he talked to the young woman. The woman appeared hesitant and afraid, but then she agreed to go somewhere with him.<br><br>I immediately called the police, and gave them the location. I told them what I’d seen, and they assured me someone would come to check it. I felt guilty letting this girl go with him and I thought of following them. But I didn’t want to interfere, and I just watched them leave. <br><br>The police called me after fifteen minutes, and asked me to identify the man. I went to the station, and identified him. He was arrested a few hours later. <br><br>The next morning, my friend called me and said she couldn’t believe it. She said she hadn’t spoken to her ex-boyfriend since they’d broken up months ago, but then she’d received a call from him yesterday morning. She said he told her he’d been fired because of his behavior. She asked me if I’d had anything to do with it, but I denied it. <br><br>She kept calling me, and then she showed up at my apartment. She said she’d been asking around, and she knew I’d been the one to get him fired. I admitted it, and she accused me of ruining his life. She shouted at me, and left. <br><br>We haven’t spoken since, and I don’t know if she’ll ever talk to me again. I don’t think I did anything wrong, but I’m not sure. AITA?