Irregardless of where the gun came from, two people in wholly seperate parts of the country chose to commit an act of violence.
These two winners in the crime lottery could have both ordered their guns from tactiblaster.com and had them shipped to a local FFL for the federally required background check.
Two people chose to commit acts of violence against innocent persons. To somehow link these guns that were previously in the hands of criminals with imparting more criminal behavior is absurd.
Why, it's almost as if these guns carry a curse similiar to that of James Dean's Porsche. Which, of course, they don't.