New trivia question

From 1948 to 1962, the CBS radio network presented a serial drama about a Hartford-based insurance investigator who traveled the country to get to the bottom of suspicious claims, which almost always turned out to center on murder or some other crime. The investigator/title character narrated cases by reading from the expense reports he sent back to Hartford. Thus, at the beginning of each episode, an announcer introduced “the transcribed adventures of the man with the action-packed expense account, America’s fabulous freelance insurance investigator …”

What was the name of this show? Click here for the answer.