This golden age story from Dynamic Comics #1 (Oct 1941) appears to be a rather blatant knock off of National / DC's similarly titled "Calling All Cars" feature, which was later renamed "Radio Squad", and originally created by Jerry Siegel and Joe Shuster. I'm sure everybody recognizes those two names.
The name of DC's lead character was Sandy Kean, and here the introductory blurb for this story even describes featured characters Powers and O'Shay as being members of "the famous radio squad."
Confused? Yeah, me too.
Enjoy!
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