This is exactly what makes this kind of thing just bone-headed stupid.
You know you didn't murder those girls, so you're just wasting valuable resources that could be better directed looking for the perp.
And if you did have something to hide, you'd be crazy to volunteer for any such 'testing'.
Do the cops really think the weapon used is going to be volunteered for testing? If they do, they should really turn in their badges and get a job more in line with their intellectual horsepower.
Running carnival rides springs to mind immediately...
L
The futility of this exercise is only apparent to law enforcement when they explain why no effort whatsoever is expended to return recovered stolen weapons to the rightful owner .
But, but, but... this proves the authorities are doing something, right. And afterall, if those evil gun owners didn’t own guns, this never would have happened.