Over at CNN, we’ve discovered the following quote from ATF Agent Nunez, investigating the spree killing at Umpqua Community College: “So far, we have recovered 13 weapons. Out of those 13 weapons we currently have in custody, six were recovered at the school, seven were recovered at the shooter’s residence. All 14 (?) have been traced to a federal firearms dealer. They are all at different stages currently in the tracing process.” In other words, it appears that all the guns used in the attack were purchased legally. If Chris Mercer was the original buyer, we can deduce that he underwent a background check – that did nothing to prevent the slaughter.