Cowell's attorneys were hoping to prove that their client isn't mentally stable.
The next stage of the trial will begin Wednesday for the jury to decide whether Cowell is...
The trial for her killer, John Cowell, began last week.
“Of course, in a perfect world I would want the death penalty,” Wilson's mother said.
Wilson, 18, was murdered last year after her neck was slit by a fare evader on a local California...