This is Case Closed, Crime Stories from the Golden Age of Radio.

Welcome back to Case Closed, your weekly hour of mystery crime and detective stories from the Golden Age of Radio.

Our first story this week is from murder by experts. We'll hear summer heat from June 13, 1949.

After that, it's gangbusters in the case of the Alcatraz Prison Riot. That one aired May 11, 1946.

Murder by experts.

The Mutual Broadcasting System presents.

The Mutual Broadcasting System presents murder by experts.

With your host and narrator, Mr. John Dixon Carr,

world-famous mystery novelist,

and author of the recently published bestseller,

The Life of Sir Arthur Conan Doyle.

This is John Dixon Carr.

Each evening at this time,

murder by experts brings you a story of crime and mystery,

which has been chosen for your approval by one of the world's leading detective writers.

Those experts who are themselves masters of the art of murder,

and can hold tensity at its highest.

Tonight's guest expert is Mr. Hugh Pentecost, author of many memorable thrillers,

who has selected a story by a young newcomer you'll do well to watch, Andrew Evans.

Be very careful as you listen, for, as Mr. Pentecost says to this thriller,

the story has not only a twist,

but an unforeseen double twist,

...