There are over 300 million guns in the United States. the "bl.
Miranda\'s only lead is the murder weapon: an AR-15, a.k.a.
Their identity and motive remain a mystery.
The killer is still at large.
But this time, it is different because one of the victims is the daughter of Marco Barros, a powerful pro-gun rights senator.
There has been another mass shooting in America, and thirteen people are dead.
This is the problem rookie ATF Agent Miranda Lopez faces.
Imagine having to find just one.
There are over 300 million guns in the United States