friend has a screenshot of my account saying the n word

So a few months ago I was on facetime with one of my guy friends and I was screen sharing while scrolling on tiktok. This was when the feature where someone can control your screen was newer so he asked if he could try it out and take control of my screen while I screen shared and I agreed. He then immediately went to the comment section on a video, typed in the n word with hard r, commented it, and then screenshotted. I was soo upset and mad because since he was in control of my screen, it was on my account so to a random person that screenshot looks like I said it. I instantly stopped the screen share and told him that thats fucked up and to delete it now. I am a white/hispanic mixed female and growing up my parents have ALWAYS made sure I understood the seriousness of racism and harmful slurs. I’ve never been okay with slurs or people around me saying them and he knows this and prior to this he’d never said a slur or done anything like this, so it really pissed me off that he would comment and then screenshot such an offensive word on MY account. He said he deleted it and I believed him and that was a few months ago.

Today, out of no where he texted me that screenshot. I am so upset now and told him that shit is unacceptable and it’s fucked he would keep that ss even after swearing he deleted it. He said he’s never sent it to anyone but me, but that’s not the point and I’m just really pissed off and upset at the entire situation. One, because it’s wrong to say words like that and he knows I’ve NEVER been okay with slurs or racism in any way, and two because it’s on my account and i’m worried about him possibly sending this screenshot around. I’m so upset and I don’t know what to do so any advice would be helpful. This is not who I am and I don’t stand for this behavior at all but I wanna make sure that screenshot is deleted before I block him.