Voluntary manslaughter is the killing of a human being in which the offender acted during the heat of passion, under circumstances that would cause a reasonable person to become emotionally or mentally disturbed to the point that they cannot reasonably control their emotions. Voluntary manslaughter is one of two main types of manslaughter, the other being involuntary manslaughter.

n. the unlawful killing of another person without premeditation or so-called "malice aforethought" (an evil intent prior to the killing). It is distinguished from murder (which brings greater penalties) by lack of any prior intention to kill anyone or create a deadly situation. There are two levels of manslaughter: voluntary and involuntary. Voluntary manslaughter includes killing in heat of passion or while committing a felony. Involuntary manslaughter occurs when a death is caused by a violation of a non-felony, such as reckless driving (called "vehicular manslaughter"). Examples: Eddy Hothead gets into a drunken argument in a saloon with his acquaintance Bob Bonehead, and Hothead hits Bonehead over the head with a beer bottle, causing internal bleeding and death. Brent Burgle sneaks into a warehouse intent on theft and is surprised by a security man, whom Burgle knocks down a flight of stairs, killing him. Both are voluntary manslaughter. However, if either man had used a gun, a murder charge is most likely since he brought a deadly weapon to use in the crime. The immediate rage in finding a loved one in bed with another followed by a killing before the passion cools usually limits the charge to voluntary manslaughter and not murder, but prior attacks could convince a District Attorney and a jury that the killing was not totally spontaneous. Lenny Leadfoot drives 70 miles per hour on a twisting mountain road, goes off a cliff and his passenger is killed in the crash. Leadfoot can be charged with involuntary manslaughter. See also: homicide murder