was it this guy?
https://www.youtube.com/watch?v=CHqR1Rql5r8Say what you want about Zappa, he gave everyone a chance to make money making music. He collected weirdos and groupies, they got paid and he got paid.
Anyway, Larry "Wildman" Fischer was a local insane person who lived with his mom or on the streets and was violent once in awhile, so Frank signed him to a contract on his label that he ran under Warner Brothers, and FIscher was a thing for a short while.
He lived with Zappa briefly but it scared Frank's wife and kids so she made him kick Larry out.