A Hawaii doctor's wife testifies against him. A dad's retrial in Mississippi. And realtor safety.

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<p>In Hawaii, anesthesiologist Gerhardt Konig is on trial for allegedly attempting to murder his wife while on a scenic hike -- and she's taking the stand against him. In Mississippi, a man is being tried a second time for the murder of his daughter's boyfriend, Kirby Carpenter. Prosecutors say the proof is the victim's silver coins found in the defendant's car. In Dateline Round Up, verdicts in Utah and New York, plus an arrest in the 2011 murder of an Iowa realtor. And tips from a real estate agent on how his colleagues can keep themselves safe on the job.</p> <p>Find out more about the cases covered each week here: <a href="http://www.datelinetruecrimeweekly.com/" rel="noopener noreferrer">www.datelinetruecrimeweekly.com</a></p> <p> </p> <p>Start listening to "Trace of Suspicion" here: <a href="https://www.nbcnews.com/traceofsuspicion" rel="noopener noreferrer">https://www.nbcnews.com/traceofsuspicion</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>