And with CHF and CAD/CAM-CNC manufacturing, such ‘forensics’ are even more problematical
FYI, this is a l-o-n-g article.
Devil in the grooves: The case against forensic firearms analysis
A landmark Chicago court ruling threatens a century of expert ballistics testimony
Last February, Chicago circuit court judge William Hooks made some history. He became the first judge in the country to bar the use of ballistics matching testimony in a criminal trial.
In Illinois v. Rickey Winfield, prosecutors had planned to call a forensic firearms analyst to explain how he was able to match a bullet found at a crime scene to a gun alleged to be in possession of the defendant.
It’s the sort of testimony experts give every day in criminal courts around the country. But this time, attorneys with the Cook County Public Defender’s Office requested a hearing to determine whether there was any scientific foundation for the claim that a specific bullet can be matched to a specific gun. Hooks granted the hearing and, after considering arguments from both sides, he issued his ruling.
It was an earth-shaking opinion, and it could bring big changes to how gun crimes are prosecuted — in Chicago and possibly elsewhere.
Hooks isn’t the first judge to be skeptical of claims made by forensic firearms analysts. Other courts have put restrictions on which terminology analysts use in front of juries. But Hooks is the first to bar such testimony outright. “There are no objective forensic based reasons that firearms identification evidence belongs in any category of forensic science,” Hooks writes. He adds that the wrongful convictions already attributable to the field “should serve as a wake-up call to courts operating as rubber stamps in blindly finding general acceptance” of bullet matching analysis.
For more than a century, forensic firearms analysts have been telling juries that they can match a specific bullet to a specific gun, to the exclusion of all other guns. This claimed ability has helped to put tens of thousands of people in prison, and in a nontrivial percentage of those cases, it’s safe to say that ballistics matching was the only evidence linking the accused to the crime.
But as with other forensic specialties collectively known as pattern matching fields, the claim is facing growing scrutiny. Scientists from outside of forensics point out that there’s no scientific basis for much of what firearms analysts say in court. These critics, backed by a growing body of research, make a pretty startling claim — one that could have profound effects on the criminal justice system: We don’t actually know if it’s possible to match a specific bullet to a specific gun. And even if it is, we don’t know if forensic firearms analysts are any good at it.