But are you not doing exactly that in reverse? I have yet to see you mention an expert in whom you have any trust, nor do you appear to know of ANY of the many who get it right, naming only those who get it wrong and using them as a yardstick against which you judge others. We can ALL produce pictures of long dead rellies who look like psychopaths, indeed it's possible that some MAY have been!!!! but the formal and artificially/unnaturally posed pictures of yesteryear are very different from those we take now.
This is just the trouble,I've yet to hear of an expert who is 100% right in their field. It takes years of the practical side of work as well as attending college/uni and studying books. Passing a few exams doesn't equate to being a fully-fledged anything,it's experience that counts,and someone in their late 20's or even 30's can't possibly be experts when it comes to diagnosing mental illnesses just by either looking at them or reading about certain traits in that person. MANY people " look " like psychopaths,also MANY people have the same idiosyncracies as Jeremy,but I certainly wouldn't like to bluntly say,without having met that person or had a face to face conversation, that anyone was a psychopath.
As for photographs,I'd say that the " sitters " are far more relaxed and comfortable than of years gone by when I think they were possibly told not to smile back then,this is why I find the one where Jeremy is smiling,is of a self-confidant young man who thought he could get one over on everyone. Sadly,it went all wrong,for I feel sure that he,himself,because he'd told the truth,thought that things would be alright.
Then again,if he'd appeared solemn,it would have spelled admission too,as anyone who is,and happens to hang their head,or hide from the crowd,usually are guilty as that's how they display their shame.