History
The Legal Distinction Between Murder and Manslaughter
Quick fact
In the U.S., the Model Penal Code defines murder as purposeful or knowing killing, or killing under circumstances manifesting extreme indifference to human life, while manslaughter is a reckless killing or one committed under extreme mental or emotional disturbance. This mental-state distinction can mean the difference between life imprisonment and a few years in prison.
Why this is interesting
Two people can both take a life, yet one may face life in prison while the other walks free in a few years. What separates them isn't the act—it's the mind behind it.