I don't think Nicole was badly hit by that first shot. I believe it was the next two that killed her.

[Igel]

6. ICE standard issue is (the Intertubes tell me) a Sig Sauer PM 320.

Apparently (I'm also told) there are various models of that variety of pistol.

9 mm. Apparently equivalent to 0.357 caliber. Don't know muzzle velocities.

On edit: As for the size of the hole, it'll depend on more than just the caliber of the bullet. Angle it hits the glass at, how the glass reacts to the stresses when the bullet impacts it, whether the bullet maintains its original shape or flattens. Note that modern car windows tend to shatter more than the old car from the '60s I drove when I was in high school, with windshields intended to mostly resist breaking (meaning that if your head hit it, your head was more likely to break than with a modern windshield).