Is there any truth that forensics guys cannot be full-time forensics? As in, they have to spend at least half their time seeing patients or something?
Yes, in fact some people even encourage this. The problem with private cases is they are freelance. It's not like there's always cases around, and if you're doing one case you might not want to do another at the same time due to the level of commitment required.
Having another job will keep your clinical skills sharp, provide another source of income, and if you don't have benefits, it could do that.
It is possible to work as a forensic psychiatrist without the training but this entails several problems, the most obvious being that you will not know WTF you are doing. I've seen several people do this and make major rookie mistakes such as refer to the defendant as the patient. Great idiot, now you just declared, on legal record, that you have a doctor-patient relationship, and now you've given the court strong reason to believe that you are no longer an objective and neutral witness. Okay, want to take it back? Now you look like an idiot for making this mistake in front of the court.
Forensic psychiatry, for better or worse, is still in a phase where you could set up shop and be possibly one of only a few, if not the only one in the entire state. For this reason, while it does create a good demand for you, it also allows plenty of people with poor skills and knowledge able to take up this trade. If you suck, too bad, they still have to go to you.
Another problem is much of forensic psychiatry, and I completely believe that forensic psychology is ahead of us in this regard, is that several psychiatrists have poor understanding of statistics and psychological testing. It turns out in studies that clinical opinion in many cases has no merit above a layman's such as in malingering, being able to tell if the person is telling the truth, etc. In other cases such as predicting future violence, clinical opinion is better than a layman, but not by much, and actuarial data is more accurate than clinical.
But psychiatrists go on the stand with none of the above knowledge established in studies, give their opinion, and often times misleadingly so, try to make as if their opinion is somehow mystical because they are psychiatrists. This type of practice is IMHO unethical, and it has led to people going to execution. The APA has voiced against this type of practice in the case of James Griggson, who without any science to back his claims, told Texas juries that convicts eligible for the death penalty should be put to death.
http://www.time.com/time/magazine/article/0,9171,954817,00.html
Indeed, Grigson's predictions are what most trouble his critics. In the Ernest Smith case decided last week by the Supreme Court, the American Psychiatric Association filed a brief that questioned the use of testimony like Grigson's. Said the brief: "It gives the appearance of being based on expert medical judgment, when in fact no such expertise exists."
I'll also add that programs, even at name-brand institutions, have forensic psychiatrists running the program that know nothing of psychological testing that are considered basic to psychologists. E.g. a SIRS, Atypical Presentation Scale, TOMM, etc. This is pathetic when you consider that a significant number of forensic cases involve malingering and that has been confirmed in studies, and that a psychiatrist's ability to tell if someone is malingering simply on clinical opinion is insignificant.
IMHO, you should shoot for programs that have a psychologist on-board as faculty (very few have this, or have a psychiatrist whose knowledge of it is on par and I only know less than 6 programs that have that), will teach you about psychological testing, and the real science behind giving an accurate evaluation.
The following programs I know for a fact will give you a good background in psychological testing: U. Mass, Case Western, UC Davis, U. of Cincinnati.
(Notice none of them are in the Ivies or other programs that people readily identify as namebrand?)
Most programs offer little in this area.
I kid you not, and I've mentioned this before on the forum, I've seen a guy, now highly ranked at a name-brand place who told me he knew nothing of objective testing used for malingering, and told me his guy was going to win simply because "I got a better suit." Given that the case was about a man who raped a twelve year old girl and even plead guilty to it, and the doctor on the other side had objective testing that was extremely reliable and valid saying the guy was malingering, let's just say that I thought this forensic psychiatrist was less than honorable. What I found more reprehensible was that any person is in a position to make 6 figures being a general psychiatrist. Is is really worth it to allow a child-rapist go free so you could make more money? (Not that doing it is ever acceptable). He was using the unethical Griggson approach of presenting himself as an M.D. as if his comments were medical science when in fact they were not.
Lawyers can at least argue that they're part of a system where ethically, they must do everything they can, even zealously, within the bounds of the law to defend their client, even if they suspect their client is guilty. The legal system is built on a premise that is often true that adversarial debate often brings out the truth. Expert witnesses? No. They are supposed to tell the truth, the whole truth, and nothing but the truth, yet several are in reality hired guns willing to say anything for the right amount of money fancying themselves as lawyers as if they operate under lawyers' ethics.