Whether a firearms examiner's conclusive testimony about ballistics matching violates a defendant's due process rights when such evidence is inherently subjective and lacks scientific rigor

QUESTION PRESENTED Whether and to what extent it violates a defendant’s due process rights to allow a firearms examiner to testify conclusively that two sets of ballistics were fired from the same gun, even though this type of evidence is inherently subjective, unscientific, and has an unknown error rate? pretix