Dramatic closings in the tech exec trial. Debate over DNA analysis in a quadruple homicide. And Dennis Murphy on Amanda Knox.

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<p>Listen to this week's episode of the Dateline: True Crime Weekly podcast with Andrea Canning. A jury in San Francisco begins deliberations in the trial of the accused killer of the Cash App co-founder. And in suburban New Jersey, science takes center stage in the courtroom ahead of the trial of a man accused of killing his own brother and his brother's family. Plus, 15 years after the trial of Amanda Knox, Dennis Murphy reflects on the case. </p><p>Find out more about the cases covered each week here: <a href="http://www.datelinetruecrimeweekly.com/" target="_blank">www.datelinetruecrimeweekly.com</a></p><p>To get new episodes every Thursday, follow here on Apple and Spotify:</p><p>Apple: <a href="https://apple.co/3Vx5THG">https://apple.co/3Vx5THG</a></p><p>Spotify: <a href="https://open.spotify.com/show/5utP1NZyMUlyaUUv7XNq7j">https://open.spotify.com/show/5utP1NZyMUlyaUUv7XNq7j</a></p><br/> <p>Hosted by Simplecast, an AdsWizz company. See <a href="https://pcm.adswizz.com">pcm.adswizz.com</a> for information about our collection and use of personal data for advertising.</p>