In this Dateline classic, wealthy residents felt safe in their gated community but it was not safe for one millionaire, murdered in his waterfront home. Police investigated but the case grew cold. Turned out the key to solving it, or two keys, were right at the front door. Keith Morrison reports. Originally aired on NBC on April 13, 2012.

Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.