Pure crap
The trivia on IMDB mentions that it's considered to be Peck's worst movie, and that's a lot of movies. I tried it because it's currently playing on Prime video. It started out ok, but then morphed into a slow-moving train wreck that I stuck with in horror, disbelieving what I was seeing. I couldn't believe Peck agreed to make this ridiculous shit show, with him going all gaga over the ever-simpering Tuesday Weld, and finally covering up the murder of his deputy, all because of his absurd fantasies over he and Tuesday making a new life together.
What Peck had to say about it was, "What audiences saw was not the picture we set out to do. John Frankenheimer, the director, left immediately after it was finished to do a picture with Omar Sharif in Europe. The studio people eliminated the prologue and epilogue which gave some sense to the story. They had Johnny Cash write songs, which simply reiterated the action on screen. Everytime I see Frankenheimer [I] say, 'I owe you one.' "