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Sneak peek: Knock Knock

Name: Sneak peek: Knock Knock
Uploaded: 2019-06-26T15:02:00-0400
Duration: 3 min 39 s
Description: Can a podcaster and a driven detective using cutting-edge technology solve a stone cold double murder? "48 Hours" correspondent Richard Schlesinger investigates. Watch Saturday, June 29 at 10/9c on CBS.

Can a podcaster and a driven detective using cutting-edge technology solve a stone cold double murder? "48 Hours" correspondent Richard Schlesinger investigates. Watch Saturday, June 29 at 10/9c on CBS.