This answers Jamison's inquiry in an earlier message board topic (Holiday Lights at the Chan Family Home). A Charlie Chan Christmas (radio) episode on Youtube.com:
Re: Charlie Chan: The Man Who Murdered Santa Claus
Thank you so much, Lou! This is a radio drama that was produced in Australia, the first in the series originally airing in 1950. Fun to listen to, and I enjoy the attempts at American accents! Well worth the listen!