New since when? This year? this month? this week?

If a defendant is found to be guilty, his or her mental status ( if they are ruled to be criminally insane) would have been addressed DURING the trial. If the court ruled the defendant fit to stand trial for the crime of which they are accused, they are not considered "mentally ill" at the time of sentencing. I am not certain what you are asking.

Provide more details for a more precise answer.