How did the gun get so rusty and dirty...The gun was found by a road maintenance crew some three months after the crime, in a highway ditch. That's why it was in such bad condition. FWIW, that kind of exposure to the elements would also ruin any ballistic "fingerprinting" done previously...
the infowarrior
The article is a bit confusing. I inferred that the Sedgwick County firearms examiner Gary Miller examined it before the defense expert. The defense guy did his examination "last spring" the Sedgewick guy did his a "year earlier".