Warren J. Kemmerling (Vern Soper) played the part as Police Lt. Earl Furlong in The Rockford Files season 1, episode 4 called "Exit Prentiss Carr".
The car driven by Emmett Byrd is a 1957 Chrysler Windsor 4 door sedan made to look like an ex-cop car (or even an ex-taxi). The Windsor was the lowest trim level for a Chrysler that year. This example has dual headlights rather than quad headlights which were an option. 1957 was the first year that quad headlights were offered and were not legal in some states.
Plot for this episode is nearly identical to Alfred Hitchcock Presents The Crooked Road (1958) which aired Oct 26, 1958.