I am never quite sure where the line between evil and good should be drawn to not piss SOMEBODY off. You get people that are fearful of labeling others and don't want insane people to be stigmatized needlessly. You get people that will tell you they know not what they do/did so find it in your heart to give them a pass. That whats done is done and it can't be fixed now. I am positive Melvin shot so far past the mark and so far beyond any definition that you can come up with for evil, that defending him requires tapping into a level of denial that before now I would have said didn't exist. If you can find a way to rationalize the life of this man I would love to hear what you have to say.
It's a long one, but well worth your time.
I will say this, if I had been on the dock interviewing this guy and he called me a cock sucker I would have shoved him and his wheelchair and his greasy hamburger into the ocean and slept well that night.
Most psychopaths are very arrogant and cocky. However, when charming a potential victim, they say all the "right" things and make you believe they are kind-hearted souls; not always, but often enough. The truth is, psychopaths are not altruistic and do not really care about friendships or ties. Guggenbuhl-Craig states that they are very talented at appearing much more humble than the average person, but are hardly so. Some are also able to feign concern about the lower classes and profess that they are on the side of the underdog, the poor, and so forth. A psychopath may claim, for instance (if he's from a low socio-economic class), that he dislikes rich people intensely, but at the same time, he will inwardly yearn and envy what they have. He is like the narcissist, desiring to reflect a false image of himself through his possessions. Among his possessions are included human beings: girlfriends, wives, and children. Some psychopaths can even very fond of animals (contrary to the common viewpoint), but still view them as objects in relation to themselves.
The psychopath is filled with greed inside, relating to the world through power, even though, as I said, on the outside he can claim to be on the side of the disenfranchised or the downtrodden. I knew one who liked to repeat phrases such as "they have to stop keeping my brothers down" but he didn't mean a word of it. He was actually a racist. The psychopath can also often identify himself as a revolutionary.
On the flip side, the psychopath also often paints a picture of himself as the downcast anti-hero (his "own worst enemy type") and some like to see themselves as lone-wolves. The psychopath may even claim he is sensitive and profound, but inside he is nothing but emptiness and greed. Whether or not the psychopath is aware of his behaviour is something that is often debated. I do believe that psychopaths usually know exactly what they are doing, although others suggest that psychopaths are "born, not made." 
I believe that psychopathy is primarily genetic. A son with a psychopathic father often will be psychopathic as well, especially if the father was abusive and/or abandoned the family as well.
As mentioned, psychopaths often claim to settle for second best (being their own worst enemy) and then think they deserve better. This may be manifested in the way they seek power -- either through money (i.e. material goods), manipulation and/or treating people as objects. By enacting such behaviours, the psychopath is also trying to "get back" at society and the world, in order to gain retribution. They will spend their entire lives doing this, whether they are rich or poor, or whatever their social background may be, although studies have shown that they often come from an impoverished or lower socio- economic background and/or social status. (In one of Dr. Donald Black's studies, many of the men were "overwhelmingly white, blue collar, lower middle class, and married, and most had not graduated from high school." [Black, 14]). (Let me add, despite Dr. Blacks' studies, psychopaths can still exist in any social class. Do not be misled). I also wanted to point out that I will be using "he" and "him" for the term psychopath throughout this website; let it not be forgotten, yes, female psychopaths exist as well; however, according to the Sixth Edition of Abnormal Behavior, printed in 2000 by three male professors, David, Derald, and Stanley Sue, the rates do differ by gender. Included in their excellent text is a report by the The American Psychiatric Association that the general estimate is 3% for men, and less than 1% in women [Personality Disorders and Impulse Control Disorders, 238].
What is very disturbing about psychopaths, besides their sense of special entitlement, is the complete lack of empathy for normal people, for "antisocials (psychopaths) seem to lack a conscience, feeling little or no empathy for the people whose lives they touch...the antisocial effortlessly resists all regulation, unable to see beyond his self-interest or to adopt standards of right versus wrong." [Black, XIII].
Not all psychopath are uneducated low-class misfits. Some of them are quite handsome and have good careers, and use this all the more to their benefit. Take a look at Ted Bundy; my friend's mother once went on a double-date with him and claimed he was the nicest person. His mother said he was the "best son any mother could have." Bundy was also apparently quite good-looking, which made him even more dangerous. So not all psychopaths are derelict, low-class, high school drop-outs, there are many who also work in professional occupations; the fact remains that there are just more psychopaths who come from impoverished backgrounds than not.
Also, not all psychopaths are calm, cool, and collected. Some of them appear strange or odd, and their behaviour can be eccentric or unusual. I believe this is what can confuse victims most often. Psychopaths often appear [see pictures here]: intense and "electrifying". Do not be misled if someone appears harmless, "foolish", or seems offbeat. An "angelic" visage can also often fool people. Just picture John Wayne Gacy in his "clown costume" as he entertained children as one example. Another example which someone on the "Victims of Psychopathy" board came up with was Bill Clinton and his "goofy" yet loveable demeanour (so is Clinton really a psychopath? Many believe he is).
A psychopath (he was diagnosed anti-social) I knew used the harmless cover-up quite well. Everyone thought he was very funny. I did too, at first. Then, little by little, I realised there was something "not right" about him. At first his seemingly harmless pranks were charming, but after a while, he became more of a nuisance and disrupted our work environment, which created havoc and tension between employees. I've learned, a psychopath can use these disguises for his own hidden purpose.Regardless of race, social class, or occupation, however, the psychopath is dangerous to society, for "the nature of ASP (psychopathy) implies that it wreaks more havoc on society than most other mental illnesses do, since the disorder primarily involves reactions against the social environment that drag other people into its destructive web...The despair and anxiety wrought by antisocials (psychopaths) tragically affects families and communities, leaving deep physical and emotional scars..." [Black, 5].
There is much to the psychopathic personality which is baffling and disturbing. 1 in about 25-30 people are psychopathic (also known as sociopaths or anti-social -- the correct title being psychopath.) Since the majority or them are men, I wrote this site in part, to warn women about the dangers, especially women online, which I believe is a favourite "new medium" which appeals to psychopaths. I have personal experience with this subject as well. This is because "antisocials (psychopaths) are not just characters in our fictional or true-life entertainments. They are family members, friends, co-workers, neighbors, or strangers we may encounter every day." [Black, 10]. Pamela Jayne, M.A., writes that "30% of men are sociopathic." If about every three out of ten men I may meet are psychopathic, I would assume this is not something to take lightly. According to these statistics, that would mean every three out of ten men and maybe every one out of ten females. The truth is, we do not really know exactly how many individuals are psychopathic; however, there seems to be a rise in the prevalence of psychopathy and that is why some claim that numbers are higher. Dr. Black claims that psychopathy leads right behind depression, along with schizophrenia and borderline personality disorder, which is an astounding fact. I am not sure I agree with his distribution of psychopaths by sex. All my experience is with women. But this is just my experience. Chasing skirts tends to give you a myopic sample.
Seems like once upon a time ago I was where I was supposed to be My vision was true and my heart was too There was no end to what I could dream I walked like a hero into the setting sun Everyone called out my name Death to me was just a mystery I was too busy raising up Cain
But nothing lasts forever Your best efforts don't always pay Sometimes you get sick And don't get better That's when life is short Even in its longest days
So you pretend not to notice That everything has changed The way that you look And the friends you once had So you keep on acting the same But deep down in your soul You know you, you got no flame And who knows then which way to go Life is short even in its longest days
All I got here Is a rear view mirror Reflections of where I've been So you tell yourself I'll be back up on top some day But you know there's nothing waiting up there for you anyway
Nothing lasts forever And your best efforts don't always pay Sometimes you get sick And you don't get better That's when life is short Even in its longest days