imported post
Ixtow, there is nothing wrong with pre-meditation as you described it, although the usage seems a little forced. I used the legal term "premeditation", when it might have been clearer if I had said "premeditated homicide", actual or attempted.
Thinking in the abstract about how you would handle a scenario that requires you to employ potentially lethal self-defense is not at all the same thing as "premeditation" as in "premeditated homicide" in the legal sense. In the latter case there is a preconceived intent to actually kill the victim. This is quite different from spontaneous defense against an unexpected attack, even though you may employ strategies which you have contemplated and trained in for self defense against hypothetical assailants and which result in an actual assailant's death (justifiable homicide).
It is when there has been previous friction with the assailant, who is therefore known to you, that thoughts of premeditated murder enter the head of DAs, and lead to trial lawyers attempting to sway the jury with rhetorical questions like "So because of a quarrel with Mr. X over entry to your property, you decided to patrol it with a loaded gun in the hope of catching Mr. X trespassing, giving you an excuse to murder him?" In such circumstances it may be difficult to prove that it was in fact Mr. X who first acted so as to put you in fear of imminent death.
I need not remind you that the goal of self defense is always to "stop the threat", not to kill. If you set out to kill and succeed, that is murder, and if you admit your intent, you would probably be tried for premeditated homicide. Woe betide if you were heard boasting that if Mr. X attacked you, you would kill him in self defense: now there is definite evidence of premeditated murder which will certainly severely taint a defense of justifiable homicide.
I will modify my statement that patrolling one's land is futile: it may be useful to establish that a trespass is taking place, but best let the Sheriff handle matters if the person is known to be a threat, partly because of the above scenario.
Other points regarding trespass in NM:
I have read that armed trespass is a 4th degree felony, but cannot find the statute again. Unarmed trespass is a misdemeanor.
Here are the No Trespassing Posting requirements for NM, including sign details.
http://www.conwaygreene.com/nmsu/lpext.dll?f=templates&fn=main-hit-h.htm&2.0
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The answer to the OP's question is the following NM statute:
http://www.conwaygreene.com/nmsu/lpext.dll?f=templates&fn=main-hit-h.htm&2.0
30-14-1. Criminal trespass.
A. Criminal trespass consists of knowingly entering or remaining upon posted private property without possessing written permission from the owner or person in control of the land.
So, legally post your land (as described above); The sheriff can then be called to immediately evict the person, and you should be able to demand prosecution for criminal trespass.
I don't see anything wrong with this picture.
C