Premeditated murder
（重定向自Prepensely）
Premeditated murder is the crime of wrongfully and intentionally causing the death of another human being (also known as murder) after rationally considering the timing or method of doing so, in order to either increase the likelihood of success, or to evade detection or apprehension. State laws in the United States vary as to definitions of "premeditation." In some states, premeditation may be construed as taking place mere seconds before the murder. Premeditated murder is one of the most serious forms of homicide, and is punished more severely than manslaughter or other types of murder, often with a life sentence without the possibility of parole, or in some countries, the death penalty .