Officials Still Trying To Trace Source Of Arroyo's Gun

Local law enforcement is still trying to determine where David Hernandez Arroyo, Sr., the Tyler courthouse shooter, got his gun.
ATF officials are attempting to follow a paper trail but right now, they say the lost the trail at a certain point.
So far they have found the gun is an import from china. Since it was brought to the United States it has changed hands several time.
The ATF says records of the gun did not lead them very far. They say they will begin using what they are calling "out of business" records to try and find a source.

Maya Golden reporting,