N.M. Stat. § 63-2-18
The governor of this state is hereby authorized and empowered, upon the application of any railroad company, to appoint, and to commission to serve, during his pleasure, one or more persons designated by such company, to serve at the sole expense of such company, as peace officers with all the powers of regular peace officers, and to give a good and sufficient bond to the state of New Mexico in the penal sum of five thousand dollars ($5,000.00) for the faithful performance of their duties. The company designating such person or persons shall be responsible civilly for any abuse of his or their authority; provided, that such peace officers so appointed shall not have authority as such to act or perform any service or to be used as peace officers with reference to strikes or labor troubles.
NMS § 63-2-18