[null and void]

Yes. But when one with a predisposition commits a violent crime we now have that predisposition manifest.

At that point, a sane society only has the option of recognizing that this is a case where the criminal MUST be eliminated. He (or more rarely, she) has demonstrated both he has the potential to become violent, and he has demonstrated his ability and desire to do so.

He has forfeited his right to continue to be a clear and present danger to his neighbors.

Only a madman or a liberal (but I repeat myself) would argue for the right for a rabid animal to have free run of the playground.

Does rabies give a raccoon a pass when it bites a child?

Why should a brain defect give a man the right to again run free and murder another?

As for those who have dead or atrophied frontal lobes/amygdala and manage to live a civil life, more power to them! They are of better stuff than those of us who never feel the temptation, the urge, and have no intrinsic resources stopping them. My hat's off to them. They have to rise above their nature, and that is what marks us as human, we can be better than our base natures by an act of will and willpower.

[daniel1212]

At that point, a sane society only has the option of recognizing that this is a case where the criminal MUST be eliminated.

Some would argue this has a larger application (not really)

Why should a brain defect give a man the right to again run free and murder another?

The problem is there is probability but not absolute proof: the researcher himself had a brain close to murderers, and the power this gives to murderous governments is too great. As in the Bible, evidence 2 or 3 eyewitness for capital crimes , with false witnesses receiving the penalty their false testimony incurred), we must wait till the crime occurred.

[daniel1212]

He has forfeited his right to continue to be a clear and present danger to his neighbors.

But as a evangelical born again Christian, i know of many credible testimonies of souls who were radically changed by Christ, though they before were manifestly very prone to crime and even considered incorruptible. Nicky Cruz of "The cross and the switchblade " (worth reading) is one case, whiile the Apostles Paul before conversion was "injurious, "haling men and men" and "compelling them to blaspheme," but became just as passionate in love to save as before he was to destroy.

"Great sinners make great saints" is often true.