In a pivotal decision that could influence future court proceedings, the Supreme Court of New Jersey has declared expert testimony on shaken baby syndrome to be scientifically unreliable and inadmissible in two forthcoming trials. This verdict arrives amid growing debates surrounding the validity of this medical diagnosis.
The state’s highest court ruled that diagnoses of shaken baby syndrome, also known as abusive head trauma, lack general acceptance in the biomechanical community, rendering them insufficiently reliable for use in legal proceedings. This 6-1 ruling directly impacts the cases of two men accused in separate incidents, where the alleged victims’ symptoms were similar to those historically linked to shaken baby syndrome.
In their detailed opinion, the justices stated, “there was no test supporting a finding that humans can produce the physical force necessary to cause the symptoms associated with SBS/AHT in a child.” However, Justice Rachel Wainer Apter dissented, arguing that the majority prioritized the opinions of a few biomechanical engineers over the “consensus perspective of every major medical society in the world.”
Justice Wainer Apter highlighted that these medical societies encompass several fields, including pediatrics, neurology, and emergency medicine, all involved in the diagnosis and treatment of shaken baby syndrome. She added that courts in every other U.S. state permit testimony on the syndrome, and no case has previously deemed it unreliable.
“No case has ever concluded that evidence of SBS/AHT is unreliable,” Wainer Apter emphasized. “And no case has ever found its reliability sufficiently questioned to preclude its admission at a civil or criminal trial.”
The Mayo Clinic describes the syndrome as resulting from the violent shaking of an infant or toddler, potentially causing extensive brain damage or death. Key symptoms include brain swelling, bleeding around the brain, and bleeding in the eyes.
Prosecutors and medical societies argue that shaken baby syndrome is a leading cause of fatal head injuries in children under two, with over 1,000 cases annually reported in the U.S., according to the National Center on Shaken Baby Syndrome. Yet, some defense attorneys and experts challenge the diagnosis, citing instances of overturned convictions in California, Ohio, Massachusetts, and Michigan.
The New Jersey Attorney General’s office has refrained from commenting on the decision. Meanwhile, the public defender’s office has praised the ruling as a “landmark” decision, underscoring the necessity for “reliable, well-supported scientific evidence” in legal judgments.
“Where the science is uncertain, the stakes are simply too high to permit unsupported expert opinions to decide a person’s guilt or to justify separating children from their parents,” stated Cody Mason, a managing attorney in the public defender’s office, in a press release.
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