re post #1152, the gunport police cars. Officer riding shotgun, literally, in vehicle [second from left] #4931 appears little too enthusiastic.
Very close to period the Smith & Wesson .357 Magnum went public; right along with expected interest from law enforcement. One goal for the designers was sufficient power to penetrate automotive body panels.
Clyde Barrow was not the only criminal using cars to hit remote locations, then escape via speed and distance. It worked until one day in Louisiana. . .