Dead Man’s Ten seconds is a Wild West phrase that refers to the fact that even after receiving deadly injury by a firearm or knife (such as stab wound to heard), a person is usually able to keep on fighting (/shooting) for at least 10 more seconds before eventually collapsing and dying.
The FBI manual on shooting clearly states that the only way to immediately stop a threat is shooting it into the area of the central nervous system at the level of neck or higher. Most self-defense manuals make it clear that you need to expect 10 - 120 seconds of enduring attack even after delivering a deadly injury, before the threat expires.
The Dead Man’s Ten is something that most games don’t implement. Considering the emphasis on realism, I would like to ask whether this is something KCD will include. Both on the side of the player as well as NPCs.