Who Is Corey Feldman's Alleged Abuser, Jon Grissom?

More information is beginning to surface regarding Corey Feldman's alleged abuser, Jon Grissom.
Here's what we know so far.
1. The former child star says Grissom first began sexually abusing him back in the '80s when Grissom was Feldman's assistant. It was during this time Feldman says Grissom -- who he referred to as the pseudonym "Ron Crimson" in the his book, Coreyography -- began giving him drugs including cocaine and crack.
2. According to Grissom's Facebook page, he is credited with two fi