No, she was not schizophrenic.

The correct spelling of the psychiatric term is schizophrenic.

it is sometimes caused by head trauma,

A number of reasons. Genetics is part of it. I have a friend who's schizophrenic and so is his dad, but they've got it under control. Like the person above posted trauma can cause it, but not just physical trauma, emotional trauma too. I know another guy who got it after a period of homelessness.

yes it was. they did a docomentry on T.V One and they (doctors) have proven him schizophrenic.

They usually occur in the late teens and early twenties.