The act of deliberately damaging the knees. This can be performed by shooting the victim's kneecaps, or by striking them with kicks, melee weapons, or other up close and personal means. Since this is an extremely painful type of injury, knee-capping can be used as a brutal form of Mutilation Interrogation. This can kill two birds with one stone for the savvy torturer, as the permanently debilitating nature of the injury makes it much more difficult for the victim to escape. Tearing up all that muscle, those sinews and those complicated bones with a bullet would in Real Life probably leave you crippled for life, if you weren't killed by blood loss or shock.