For those who are forensics trained and practiced in multiple states like @whopper , how much do you feel is state dependent vs. applicable nationally?
Unfortunately the locality can heavily make up the results and not because of the laws but due to ignorance.
Local yokel judge for example is doing something completely inappropriate, doesn't know it, no one wants to say it cause they don't want to risk the judge's ire.
E.g. the patient is ordered by the court for an NGRI evaluation and a competency evaluation at the same time. You can't do an NGRI evaluation until it's already been determined that the patient has the capacity, and then competency by the court to give an NGRI decision for a defense. Turns out the idiot local forensic psychologist (or psychiatrist) does it this way so she can double-bill for the same amount of work and told the local yokel judge this is completely appropriate.
So I'm called in the case, am asked to do both the NGRI and competency evaluations at once and I say this goes against the professional ethics without trying to say this actually violates legal procedure to save the judge face. Judge mutters to lawyers "but we've been doing it this way for years and Dr. Joanna Quack told me so!"
And this was in a locality that was only minutes away from Hamilton County, OH where from my experience the judges are the most on top of the legal/medicine interface more so than I've ever seen in any other place I've worked. In large part because Ohio had 3 power-house forensic psychiatrists (Phil Resnick, Doug Mossman, and Steve Noffsinger) not only work in this state but heavily guide the state towards the light with forensic psychiatry.
I had a local judge who did not know mental health law at all preside over a forensic psychiatric case and the guy every few minutes declared this was his first mental-health related case and triple checked the case law and did everything appropriately. I was very impressed. I could tell he must've spent at least a dozen hours reading the case law, and during the case he specifically said comments like, "I'm basing my decision on the precedent established in the case of X v Y for future-reference," while the local-yokel judge I mentioned above I could tell tried to cut every corner, do the least amount of work possible, and wasn't aware of the landmark cases that already determined the norms of practice his court was not following.
A forensic psychiatrist could write a 50 page report and some judges only read the last paragraph where you give the thumbs up vs down to the specific legal question.
The bottom line is a lot of this depends on the judge. The lawyer working with you may know the judge's thought process. Of course know the state and local laws but guess what? Depending on the judge none of this, despite being important ethically, legally, everythingally you can think of, bad judge-doesn't matter. If he doesn't know the law, it won't much if you follow the established precedent that he's not for this specific case. All you can do is do your best so you can walk out of there with your self-respect intact, and on the chance the case is appealed you can claim you did what you were supposed to do while others were not.