It might be dry reading,
BUT, if you want statistics, see:
MORE GUNS-LESS CRIME
By John Lott
Truly a MASTERPIECE of investigative journalism, and he qualifies all claims. He details the methodology of his studies, the reasons for using said methods versus others. He points out where other research on the subject is flawed, and I've yet to find anyone to discredit his work.
He will give you
ALL the "ammo" you need

to debunk her "statistics.
BTW

__________________
NRA Patron Life Member
DORMANT U.S. Marine
Semper Fidelis
"The secret of my influence has always been that it remained a secret".
"Cogito, Ergo armatium sum": I think, therefore I am armed