<p>The 1985 murder of Natalie Antonetti was a cold case for over 20 years. But then an anonymous phone call to the police pointed them back to the man who claimed innocence and seemed to have had an air-tight alibi. "48 Hours" correspondent Tracy Smith reports. This classic "48 Hours" episode last aired on 5/24/2014.</p><p>Watch all-new episodes of “48 Hours” on Saturdays and stream on demand on Paramount+.</p>