Final answer:
The U.S. courts are reluctant to accept genetic evidence to reduce responsibility for violent crimes due to the balance between individual rights and public safety, the legal principles of culpability, deterrence, and retribution, and the enduring nature of eyewitness accounts despite known issues.
Step-by-step explanation:
Courts in the United States tend to be reluctant to accept genetic evidence in reducing or exonerating a person accused of a violent crime for several reasons. One significant factor is the legal system's basis on established principles such as culpability and the nature of the crime itself.
Eyewitness misidentification has been a leading cause of wrongful convictions. However, courts also balance individual rights with the government's duty to maintain order and public safety. The courts have been cautious in using genetic evidence to argue for diminished responsibility because it might conflict with established principles of justice, such as the need for deterrence and retribution.