The Massachusetts Supreme Judicial Court has ordered a new trial for Keith Williams, who was convicted of first-degree murder in 2017. The court found that the Commonwealth improperly admitted gunshot residue evidence that did not meet scientific standards. This ruling could significantly impact the case against Williams and the use of gunshot residue evidence in future trials.
Williams was convicted in connection with the 2014 shooting death of Dawn Jaffier and the nonfatal shooting of Lealah Fulton during a parade in Boston's Dorchester neighborhood. The court's decision highlights the importance of reliable scientific evidence in criminal trials and its implications for the justice system.
Background
The case stems from a shooting incident that occurred on August 23, 2014, during a parade on Blue Hill Avenue in Dorchester. Keith Williams, along with two companions, was seen near the scene shortly before the shooting. Although no witnesses directly identified Williams as the shooter, he was observed disposing of a firearm shortly after the incident. The Commonwealth charged him with murder, armed assault with intent to murder, assault and battery by means of a dangerous weapon, and carrying a firearm without a license.
The trial took place in 2017, where the jury convicted Williams based on circumstantial evidence, including his proximity to the crime scene and the gun he disposed of. However, the prosecution's case relied heavily on gunshot residue evidence, which became a focal point of Williams' appeal. He argued that the trial judge erred in allowing expert testimony regarding gunshot residue testing, which he contended was unreliable.
The Ruling
On September 22, 2026, the Massachusetts Supreme Judicial Court ruled in favor of Williams, stating that the Commonwealth failed to establish the reliability of the gunshot residue evidence. The court pointed out that the Commonwealth's expert testified that a positive test result requires at least three gunshot residue particles, and that nothing could be inferred from a negative result.
The court ruled, "the Commonwealth failed to establish the reliability of using the subthreshold number of gunshot residue particles detected in a negative test result as evidence that the defendant was the shooter."
The justices noted that the admission of this evidence was prejudicial and warranted a new trial. The ruling was made by Justice F. Dewar, along with the court's other justices, including Chief Justice Budd and Justices Gaziano, Wendlandt, and Wolohojian.
Impact
This ruling has significant implications for Williams and the criminal justice system in Massachusetts. It sets a precedent regarding the admissibility of gunshot residue evidence, emphasizing that such evidence must meet established scientific standards to be considered reliable in court. The decision underscores the necessity for the prosecution to provide a solid foundation for expert testimony, particularly in cases where the evidence is critical to the defendant's guilt.
Williams' case highlights the potential for wrongful convictions based on unreliable evidence. As the court noted, the Commonwealth's expert acknowledged that the presence of gunshot residue particles could not conclusively indicate that a person fired a gun, which raises questions about the integrity of the evidence used to convict Williams. This ruling may encourage more rigorous standards for scientific evidence in future criminal trials.
What's Next
Williams is now entitled to a new trial on the charges of murder in the first degree, armed assault with intent to murder, and assault and battery by means of a dangerous weapon. The Commonwealth may choose to retry him, but the ruling complicates their case due to the court's decision regarding the gunshot residue evidence. There are no indications in the court filing about any related cases pending or further appeals.