Wild West Law Enforcement, c. 1880

From From the River to the Sea: The Untold Story of the Railroad War That Made the West, by John Sedgwick (Avid Reader / Simon & Schuster, 2021), Kindle pp. 160-161:

At the end of 1878, Colorado had been a state for only two years. Most of its western neighbors were still territories and would remain so for decades more. While the Colorado governor held the power to call out the state militia, it was a largely untrained force of irregular volunteers. There was no police force worth the name, just city marshals with a few deputies, who concerned themselves with individual crimes like murder, fraud, and theft. Horse theft was still on the books as a hanging offense, and, in mining camps, a five-dollar theft was enough to earn a noose from Judge Lynch. There was no state police, let alone any FBI, to deal with the larger-scale crimes of more powerful interests. In 1864, an innovative Denver city marshal named Dave Cook had the idea of creating a regional police force, the Rocky Mountain Detective Association, to counter broader-scale criminality, relying on cable communication to coordinate crime fighting across the West from Wyoming to Texas. At its height, it consisted of over a hundred cowboy detectives, most of them city marshals, and accounted for several thousand arrests over the thirty-five years of its existence.

But even that effort was somewhat ad hoc, designed to solve only the crimes for which there was reward money. While the Wild West was often thought to be populated by murderers and desperadoes, such criminality was mostly confined to seedy hotbeds like Deadwood, Tucson, and Dodge City that were filled with drunken cowboys out for a good time. Elsewhere, life was fairly sedate; people needed to be good neighbors to survive.

In the territories, and in fledgling states like Colorado, government was not designed to serve voters so much as the powerful moneyed interests who controlled the fortunes of the elected officials. The railroad men were at the top of this list, but cattlemen, developers, miners, and wholesalers had plenty of say. When those interests were threatened from below by, say, a miners’ strike, the governor might dispatch the militia to preserve order. But discord was much harder to contain when two powerful interests clashed, for each could usually call on friends in government to take their side, making the conflict nearly impossible to resolve.