Pinkertons are practically a mainstay of the western genre. One example I've seen recently is the 2007 remake of 3:10 to Yuma in which they play a fairly impo

Pinkertons are practically a mainstay of the western genre. One example I've seen recently is the 2007 remake of 3:10 to Yuma in which they play a fairly important role. IMDB has a list that's far from comprehensive: https://www.imdb.com/search/keyword?keywords=pinkertons https://www.imdb.com/search/keyword?keywords=pinkertons