A Miss Marple Nightcap: Tape-Measure Murder by Agatha Christie

A Miss Marple short story is always cause for celebration, and this
one is no exception. Come with us--to St. Mary Mead, of
course--where Miss Marple finds herself at the center of a local
murder, the solving of which will uncover a long-held secret from
the past. In other words: all is exactly as it should be in the
Christieverse.... This episode is sponsored by YARN and Best
Fiends.