Update: I sent all my documents and time lapse of my work. My professor formally apologized. I'm so glad I was able to resolve it! I don't know if other artists do this, but I always make sure to document my work just in case.
I'm gonna big brain next time my teacher accuse me of using Ai. Everytime when I work I'm gonna stream it online and if they get mad I'm like CHECK THE VOD.
That's why when I was younger back in 2009. Everytime I draw would have a .png file and a .sai .clip or .psd file for the art software I'm using IN CASE someone accused me of tracing or saying I didn't draw that.