RSA 630:1-a First Degree Murder.

I. A person is guilty of murder in the first degree if he:
(a) Purposely causes the death of another; or
(b) Knowingly causes the death of:
(1) Another before, after, while engaged in the commission of, or while attempting to commit felonious sexual assault as defined in RSA 632-A:3;
(2) Another before, after, while engaged in the commission of, or while attempting to commit robbery or burglary while armed with a deadly weapon, the death being caused by the use of such weapon;
(3) Another in perpetrating or attempting to perpetrate arson as defined in RSA 634:1, I, II, or III;
(4) The president or president-elect or vice-president or vice-president-elect of the United States, the governor or governor-elect of New Hampshire or any state or any memb