Australian Produced Mystery Stories Carter Brown isn't the name of a detective, rather it's a pseudonym
for an author, or actually several authors of detective fiction in Australia. The primary user of that pseudonym was Alan Geoffrey Yates.
In the 1950s, according to the University of Queensland News, imported American cultural items were banned from Australia allowing them to
produce many American-style dramas. The Carter Brown Mystery serials were the Old Time Radio Detective equivalent of the Spaghetti Westerns.