Person brought a gun outside of their property. Premeditated murder. Done.

I get your point, and IANAL, but this is just not the case in the US, and it is unconstitutional for a government to make that argument. For better or worse you have the right to carry a gun on your person off your property, and millions of Americans do it every day without intending murder.

The rest of your comment I agree with. Just don’t be muddying the water with a constitutionally protected act being somehow suspicious or against the law.