Violent J was a member of Inner City Posse, but it isn't known if he is a member of a gang any longer.
My search did not reveal which album the song Sleepwalker by Violent J in on....
There has been no mention so far of Joseph Bruce of ICP having cancer. !
There has been no information released stating that Violent J from ICP has AIDS.
According to this ICP website Violent J doesn't have any neck tattoos.
Violent J has not mentioned having throat cancer in his biography.