The link is the source, but he used the "you" pronoun and I rephrased it as "him". Sorry for the confusion, I probably need to do better on a public forum like this.

Wikipedia also has a paragraph about it, if you'd like to dig into this topic further.

https://en.wikipedia.org/wiki/Kanye_West#Mental_health

Also I reject the assumption that I assumed that "whenever someone is forcibly restrained and medicated, it was justified". I haven't said this, and I only reported on his account on the happenings, because OP wanted evidence for mental illness, and I think that him recollecting that occurrence, while admitting that he was diagnosed bipolar, is good enough evidence.