You really need to read about the case of Scott Sciple, a Marine facing charges over a fatal DUI wreck last year in Tampa, Fla. (The victim was a mechanic named Pedro Rivera.)
The authorities say Sciple's BAC was well over the limit, but his lawyer plans to use an insanity defense because of his client's PTSD and brain injuries, which he sustained over four combat tours. They argue that Sciple went into a dissociative state the night of the wreck.
Investigators from the Marine Corps looked into the case and came to the following conclusion:
"This investigation reveals a disturbing vulnerability in the support we provide our combat veterans suffering the invisible wounds of PTSD," wrote Col. John P. Crook of the U.S. Marine Corps Reserve, in a Sept. 26, 2010 letter.