As usual for bottom of the barrel 1950's re-enactments, clothing. furniture, and even automobiles are strictly late 1940s/early 1950s vintage, not 1920s and 1930s especially in the Kansas City Massacre, although the names of notorious gangsters killed in the 1930s, such as Clyde Barrow, Bonnie Parker and Pretty Boy Floyd are tossed around like confetti.
Although presented in a pompous, semi-documentary style, with the lives, crimes, and deaths of such widely known real-life criminals as John Dillinger, Clyde Barrow, Bonnie Parker, the Barker gang, and Pretty Boy Floyd, among others, and of course, the Federal Bureau of Investigation's pursuit of these people, this film displays the usual disclaimer over the end credits, "All events, characters, firms and institutions in this photoplay are fictional and any similarity to any persons, living or dead, or to any actual events or to any actual firms or institutions is coincidental and unintentional," followed by the names of the cast members who portrayed these very people.
The same large black sedan used in many scenarios is a 1947 Cadillac Fleetwood 75.