I am not sure what you mean by 'evil'. I do not quantify things in such absolute terms of black and white. We lead our lives through believing what is 'right' and 'true' as being our reality. However what is 'right and 'true' are vague concepts and only perspectives if you will.Thus this 'reality' could very well be an illusion for all we know -
That's the literal mindfuck since most criminals are products of a dysfunctional or delusional society or have acted in a manner that they have deemed as being 'correct' in a difficult situation or may well be perfectly rational people who have acted out of impulse.The idea of morality is a very complex thing and I could go on here....
However for the sake of argument I shall bite and assume you speak of social delinquents such as sociopaths or mass murderers. Here, as psychological profiling of such criminals will tell you is that these individuals have a warped perception of reality or a twisted moral compass. They actually feel no remorse for their actions and actually believe what they are doing is 'right'. So to punish them effectively serves little purpose and there is no need to do something 'drastic' of course such as altering their brain; while it would be possible to do that and make them functional members of society at least theoretically. However change can be induced to an extent even by CBT or cognitive behavior therapy as it is known. The criminal justice system is not without its flaws.
It is much easier if we do not actually quantify things in absolutes of good and evil but rather actions and consequences.
In the words of the joker" "Ladies and Gentlemen! You've read about it in the papers! Now witness, before your very eyes, that most rare and tragic of nature's mistakes! I give you: the average man. Physically unremarkable, it instead possesses a deformed set of values. Notice the hideously bloated sense of humanity's importance. Also note the club-footed social conscience and the withered optimism. It's certainly not for the squeamish, is it? Most repulsive of all, are its frail and useless notions of order and sanity. If too much weight is placed upon them... they snap. How does it live, I hear you ask? How does this poor pathetic specimen survive in today's harsh and irrational environment? I'm afraid the sad answer is, "Not very well." Faced with the inescapable fact that human existence is mad, random, and pointless, one in eight of them crack up and go stark slavering buggo! Who can blame them? In a world as psychotic as this... any other response would be crazy!"
Do read my second post. Damage to your brain could drastically alter who you are.
so your implying that we can recondition criminals by altering their brains theoretically? and anyone who chooses to do evil, simply has a defunct brain? interesting idea.
which probaly means that we shouldn't be punishing anyone, becuase their brians are wired for evil they can't help it.