Nope. IT's completely destroyed.
Modifer. The same -5, but not sure if it is a modifier to spellcasting roll or a treshold for hits.
Healing Characters with Implants:Low-Essence characters are more difficult to heal, as implants (or other damage) disrupt the body’s holistic integrity. In game terms, this means a dice pool modifier applies to the Spellcasting Test equal to the subject’s lost Essence (rounded down). So trying to heal a character with Essence 4 (2 Essence points of implants) incurs a –2 dice pool modifier.
even the pistol?
that mist have been some weaponfire.

wonder How Sam Survived
I do not want to sound ungratefull but Larz dont you want to reconsider healing Sam, as far as i understand healing drain is "Damage to Sam" -2 meaning at this moment the drain you have to endure is 3P and 9S -2 = 10 and it would be very hard.