However, within the law,
premeditation can be formed within a minute or less. It does not have to be months of planning, weeks or even days. It can be any amount of time that it takes a person to decide to continue their actions that is intended to cause the other person's death.
In Colorado,
first degree murder must commonly occur in one of three manners: (1) intentional murder where the person
after deliberation and with intent to cause the death of a person, does cause the death of that person or of another person; (2) felony murder, which means that someone was killed in the course of another crime such as arson, robbery, burglary, kidnapping, and sexual assault; (3) extr
eme indifference murder where the person does not target anyone in particular but given his extreme indifference to life generally he engages in conduct that creates a grave risk of death to a person, and thereby causes the death of another.
In
The People of the State of Colorado vs. William V. Sneed, the appellate court held that premeditation required deliberation and reflection to create the premeditated intent before the act.
This means that between the forming of the intent to do the act and the act itself,
an appreciable length of time must have elapsed to allow deliberation, reflection and judgment.
U.S. v. Mack, 466 F.2d 333 (D.C. Cir.)
http://www.courts.state.co.us/Glossary.cfm
I apologize for getting carried away!