 Nicole, you have been reporting that this was an AR-15 or AR-15-style weapon used by the shooter. What do we know about how he obtained it? Do we have any detail from the ATF at this point? Not at this point. We do know that ATF is tracing this weapon. Margaret trying to determine right now. FBI also searching the home, trying to figure out if there were other weapons there. Herman, if this was his weapon, no positive confirmation of that.