When Trent asks Dean if she hit him with a "mashie or a niblick", he is referring to the kind of golf club she used. At the time, golf clubs had names and not numbers - which would not come into use until after WW2. A "mashie" would be the equivalent of a modern 5-iron, and a "niblick" would resemble a 9-iron.
The $30.00 that the Elissa Landi character pays the Raymond Hatton character to pose as a dead body would be the equivalent of over $620.00 in 2022.
Although Edgar Kennedy frequently played comically bumbling cops, this was a rare opportunity for him to play a reasonably competent one.
This film's television premiere took place in Los Angeles Tuesday 11 June 1957 on KTTV (Channel 11); it first aired in Chicago 12 July 1957 on WBBM (Channel 2), in Norfolk VA 30 September 1957 on WTAR (Channel 3), in Altoona PA 4 October 1957 on WFBG (Channel 10), in Philadelphia 10 October 1957 on WFIL (Channel 6), in Miami 15 October 1957 on WCKT (Channel 7), in Lebanon PA 18 October 1957 on WLBR (Channel 15), and in Honolulu 22 November 1957 on KHVH (Channel 13); in New York City, its earliest documented airing took place 10 April 1963 on WCBS (Channel 2).
E.C. Bentley wrote the popular detective novel Trent's Last Case in 1913. Its central character, the artist and amateur detective Philip Trent. Coincidence or not.