Why did Isaiah Lee, 23, attack Dave Chappelle the other night? Rolling Stone is quoting his 31 year-old brother, Aaron Lee, who says, almost anecdotally, that Isaiah “has been in and out of Los Angeles homeless shelters for the past decade and struggles with mental illness.”

Aaron added that Isaiah “doesn’t have any type of animosity toward [Chappelle] that I know about…it could have definitely been a factor, but I really don’t know.”