Murder knife

The Murder Knife is an optional dialogue device used to dispose of characters unexpectedly in Dragon Age: Origins, Dragon Age: Origins - Awakening and Dragon Age II.

Uses in Dragon Age: Origins
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Ruined Temple

 * Brother Genitivi - If the Warden refuses to let Brother Genitivi tell others of the Urn of Sacred Ashes, he walks away from the warden shaking his head. The warden pulls the knife out and throws it at Genitivi. Brother Genitivi turns around to show the knife stuck in the back of his head. He then falls to the ground, dead.

Ostagar

 * The prisoner at Ostagar - He offers you a key in exchange for some food. You choose to kill him and take it. As you draw the knife and start walking towards him he screams for help but you stab him in the heart and kill him.
 * Dog - In the camp at Ostagar you will find a Man caring for a sick mabari hound. He asks you to go in and put a muzzle on it so that he can medicate it. You have the option when you enter to draw the dagger and kill the mabari. This is one of the occasions where the screen turns black and you do not witness the killing.
 * Pick - If you fail at persuading him into giving you Ser Garlen's Sword, you can accuse the elf of being a deserter and then be given the choice of stabbing him in the stomach.

Arl of Denerim's Estate

 * Off-duty guard - As a Male/Female City Elf, while sneaking into the castle you will be confronted by a group of off-duty guards sitting in the dining hall. If you have weapons on your back they ask you where you got them. Unable to think of an excuse you exclaim "Oh sod it" and throw the knife across the room. It hits one of the men in the neck, killing him.
 * Sleepy Guard - As a Male City Elf, when assaulting the Arl of Denerim's Estate. You can wake the guard up and ask him questions, then slit his throat.

Korcari Wilds

 * Wounded soldier - While preparing for the joining in the Korcari Wilds you find a wounded soldier whose regiment was wiped out by Darkspawn. You have the option of saying you do not have time to help him and slit his throat.

Lothering

 * Unscrupulous merchant - In Lothering there is a greedy merchant who is arguing with a woman from the Chantry about him overpricing his wares. You can drive the sister away and then slit the merchants throat.

Castle Redcliffe Dungeon

 * Jowan - In Redcliff you find Jowan locked in a cell. You have the option to stab him through the cell bars.

Castle Redcliffe

 * Connor - You will have the option of killing Connor with the knife or by allowing Arlessa Isolde to do the deed instead.

Redcliffe Village

 * Lloyd - After asking the barkeep to help defend the village with a low cunning/persuade, this will give you the option of throwing a knife into his back.

Random Encounters

 * Zevran - After he ambushes you on the Long Road, you can wake him up to question him or slit his throat.
 * Bandit Leader - As part of Leliana's quest, you can let him leave or slit his throat.

East Brecilian Forest

 * Danyla - In the East Brecilian Forest, a dalish elf-turned-werewolf asks you to end her pain and kill her. If the warden agrees he/she will stab her in the chest, to which she thanks you for.

West Brecilian Forest

 * Deygan - In the West Brecilian forest, you can encounter a wounded dalish hunter. You can choose to kill him while he is still unconscious.

Dalish Camp

 * Sick Halla - You can persuade Elora to put the Halla out of its misery or offer to do it yourself.

Aeducan Thaig

 * Scout - As a Dwarf Noble, when the common soldier gives false testimony to what happened with Trian, you have the option to call him a traitor and stab him in the stomach with the knife.

Dust Town

 * Nadezda - You have the option to kill her during the Entering Jarvia's Hideout quest, acting as if she betrayed the Warden to Jarvia.

Circle of Magi

 * Godwin - During the "Precious Metals" quest with the right dialogue choices, you get the option to slit his throat. ("This is only available if you have been to Orzammar and talked to Rogek, before doing the Broken Circle quest")

Arl of Denerim's Dungeon
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 * Vaughan - During the "Rescue the Queen" quest, Vaughan is locked in the dungeon by Rendon Howe. You can use the option "No ones missed you".
 * Rexel - During the "Rescue the Queen" quest, Rexel is locked in the dungeon by Rendon Howe. You can choose to put him out of his misery.

Uses in Dragon Age: Origins - Awakening
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Wending Wood
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 * Dying Militiaman - You will find a man tainted by the Darkspawn, and can choose to end his suffering by slitting his throat.

Uses in Dragon Age II
The Murder Knife returns, albeit much improved this time. A new murder knife was added about halfway through the production process, but there are scenes still featuring the old one. If Hawke is an Archer, he/she can use the Murder Knife as a secondary weapon to kill enemies who get to close in combat.

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The Blooming Rose

 * Idunna - During the "Enemies Among Us" quest, you can choose to kill her with a knife to the chest.
 * Hawke - During the "Enemies Among Us" quest, Idunna tries to use Blood Magic to make Hawke slit his/her own throat. This will always fail.

The Wounded Coast

 * Reiner - During "Wayward Son" quest, you can state "I don't need to step" when threatened with Feynriel's execution to throw a knife at the slaver, killing him before the ensuing battle - if you are a rogue.
 * Javaris - During the Blackpowder Courtesy quest, you will be given the choice to kill him with a knife to the back of the head.

Kirkwall Docks

 * Aden - During the "Finders Keepers" quest, you can use the knife to intimidate Aden to reveal the location of the crates you are looking for. This will only work with an aggressive personality.
 * Lord Harimann - During the "Loose Ends" quest, you can choose to kill him by throwing the knife into his forehead. This action will later change some of the dialogue at the start of the "Repentance" quest.
 * Keran - During the "Best Served Cold" quest, after discovering that he was involved in the kidnapping of Bethany or Carver. You will be given the choice of stabbing him in the stomach.

Abandoned Ruin

 * Kelder - During the "Magistrate's Orders" quest, if you decide to kill Kelder, Hawke will use it to slit Kelder's throat.

The Fade

 * Feynriel - During the "Night Terrors" quest, you have the option of making him a Tranquil by stabbing him in the back with the knife. This is only available for rogues.

Lowtown Bazaar

 * Anders - After he blows up the Chantry at the start of "The Last Straw" quest, you will be given the choice to stab him in the back.

Dark Foundry

 * A skeleton - When the final enemy is slain in the battle against Quentin and his minions in the "All That Remains" quest at the beginning of the cut-scene, Hawke will kill one last skeleton by throwing a knife into its head. This plays out the same way for all three classes.

Darktown

 * Danzig - If Fenris is in your party during the "Wayward Son" quest, Hawke can use him to make the slaver give him the information. Having Fenris intimidate Danzig into talking will give you the option of killing the slaver with a knife to stomach. This will only work with an aggressive personality.
 * Gascard DuPuis - After the "All That Remains" quest, you can find the blood mage in Darktown. You can intimidate him by using Fenris into revealing his true intentions. He will then explain that he was lying about having a sister and that he wanted revenge on Quentin for not teaching him the secrets of necromancy. Once he finishes telling you these revelations, you have the choice of killing him with a knife to the stomach.

The Chantry

 * Karl - During the "Tranquility" quest, Anders will end the suffering of his friend by stabbing him in the stomach. You have the choice to encourage Anders to help Karl by having him do the deed.
 * Female Mercenary - During the "Fools Rush In" quest, Isabela will throw a knife and hit a mercenary woman in the chest right next to Hayder.
 * Merrill - After the Pride Demon fight during the "A New Path" quest, Marethari will stab Merrill and the demon will use her blood to start another fight.
 * Marethari - After the Pride Demon fight during the "A New Path" quest, you can have Merrill kill the Keeper by saying "You said you had to die". Merrill will stab her in the stomach.

Antivan Camp

 * Male Antivan Crow - During "A Murder of Crows" quest, Zevran will throw a knife into the right eye of one assassin. }}