Part of the confusion arises from the fact that police found a semi-auto shotgun locked in Lanza's car (well, his mother's) at the school.
In Friday's earliest reports, reporters assumed the shotgun they saw the police remove from the car was the Bushmaster. Remember that these reporters used to think everything was an AK-47; now, every 'scary' firearm will be an AR-15.
“Remember that these reporters used to think everything was an AK-47; now, every ‘scary’ firearm will be an AR-15.”
You’re right, but the new buzzword is Bushmaster.