Coup de Grace
As stated in the rules, a dying or unconscious character can be killed by a coup de grace. Any adjacent enemy can perform a coup de grace as a major action, and this automatically kills the target. A ranged attack can be used to deliver a coup de grace if the attacker makes a successful attack roll vs. Defense 10.
In addition, a NPC cannot deliver a Coup de Grace at range, and may not move to deliver a Coup de Grace if the target is flanked by at least 1 ally.
Finally, a coup de grace may be made against an unaware enemy using the stated rules, but requires a successful active Dexterity (Stealth) Check against Perception (Seeing) or Perception (Hearing).
Example: Oghren falls in combat, and a Hurlock immediately adjacent to him performs a quick Coup de Grace. Oghren must now consult the Death and Dying rules.
Example 2: Morrigan falls in battle, but Alistair quickly beheads the genlock that felled her. Since no other enemies are immediately adjacent to Morrigan and Alistair is adjacent to her, no other NPC’s can move in to perform a coup de grace.
Example 3. Zevran and Leiliana catch two of Arl Howe’s guards unawares. Zevran sneaks in quickly and slits one guards’ throat (A successful Dexterity (Stealth) vs Perception (Hearing) check, while Leanne puts an arrow through another guard’s eye socket, (Another successful Dexterity (Stealth) vs Perception (Seeing), in addition to a successful attack against a defense 10 target with her longbow, as stated in the rules above).