Sheepdog Tip of the Day, Before Combat tip 93
"Thou shalt not kill" doesn't mean God doesn't want you to kill in the line of duty. The accurate translation is "Thou shalt not murder". Lawful use of deadly force to protect innocent life is very much approved by the Bible. Exodus 22:2 (KJV): "If a thief be found breaking in, and be smitten that he die, there shall no blood be shed for him."
Lt. Col. Dave Grossman, The Bullet Proof Mind seminar (paraphrased)
Sheepdog Tip of the Day services: 
   Follow SheepdogTip on Twitter Tip Memorization Songs 
 Other killology services:
 Bullet Proof Mind for the Armed Citizen Seminar
 The Killology web site
 Additional Resources
 
  For PTSD, Shepherd Resource Group.