Final answer:
Capote includes Dr. Jones's report to question the relation between intellectual capacity and criminal culpability, and to reflect on the use of intelligence tests as scientific tools in the judicial process. The report adds depth to the narrative and prompts readers to think about the complexities of justice and legal decision-making.
Step-by-step explanation:
Capote includes Dr. Jones's lengthy report in his narrative for several reasons, even though it was not admitted into evidence during the trial. Primarily, this inclusion serves to provide readers with a deeper understanding of the complexities surrounding Jean's mental condition, a critical aspect of the legal question presented in the case. This report backs up the defense's argument that Jean possessed the intellectual capacity of a ten-year-old child and may not have comprehended the nature and quality of his act. By presenting this evidence, Capote stimulates thought in the readers on the significant legal issue of criminal culpability and intellectual capacity.
Moreover, Capote's inclusion of the report adds authenticity to the narrative, showing how intelligence tests of the era were being used as new scientific tools to understand a defendant's mental state. It also highlights the tension between legal procedures and justice, demonstrating how crucial evidence may be excluded from a trial, potentially swaying the jury's decision. The in-depth reporting calls into question the fairness and thoroughness of the trial, encouraging the reader to further engage with the moral and ethical dilemmas at play.