Bullets don't touch her

Bullets don't touch her as she kills twenty men in under a minute with glass shards as weapons:
Mary is out of the window, armed with glass shards and she’s out for blood.

Like a madwoman, a devil straight from the fires of hell, Mary goes on a rampage. No bullets touch her as she viciously cuts out throats, intestines, and organs with nothing but glass shards. The yard becomes a bloody mess as Black Eagle Gang members try fruitlessly to escape the demon that wanted nothing more than to take their lives in the most painful way possible. In only a minute, all twenty plus members of the Black Eagle Gang lay dead or dying, in extreme pain with a pool of blood around them.

Chapter 30, The Sting of Death