Final answer:
The author implies that guilt is solely attributed to the person who committed the murder.
Step-by-step explanation:
In the given text, the author implies that guilt is solely attributed to the person who committed the murder. The author mentions that the jury accepted the defense's argument that the boy did not have the mental capacity to fully understand the nature and enormity of his crime, which suggests that they believe the person who committed the murder should bear the guilt. The phrase 'unaccountable to a great many people' indicates that the author disagrees with the jury's verdict and believes the person who committed the murder should be held accountable.