The defendant, as part of his defense in a criminal trial, requested the court to appoint...

The defendant, as part of his defense in a criminal trial, requested the court to appoint a qualified cytogeneticist to carry out chromosomal testing of his blood at the county’s expense. The purpose of the tests would be to determine whether the defendant had the XYY chromosome pattern. If so, the results would be used as part of his insanity defense and would be offered into evidence. Should evidence of chromosome abnormality be admissible as part of the defense of insanity in a criminal trial?

Expert Solution

Yes, the evidence of chromosomal abnormalities can be admissible as a part of the defense of insanity in criminal trial. According to Nigerian Criminal Justice system the chromosomal abnormalities can admissible as a part of defense insanity. In criminal trial. But it was not applied due to valid alternative defence. The XYY syndrome is a chrosomal abnormality, occurs due to non disjunction of chromosome during meiosis cell division of life. The person is male, but he has very low IQ of 10 to 15 and have a taller body startcher generally more than 6 ft. The are generally suffer from sever psychosis and aggressive behavior. Such condition leads to involve them into criminal activity. Various chromosomal abnormalities can leads to criminal activity. They sometime causes hearm to other people or self. They has to identify by proper diagnosis of chromosomal testing and proper treatment, counselling, behavior and occupation therapy are required.

Nightingale answered 2 years ago

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