Mark Sievers fights death sentence. Miami model accused of murder. Plus, John Wayne Gacy mini-series.

Listen to this episode from Dateline NBC on Spotify. Dennis Murphy drops by to talk about the latest in the case of Mark Sievers, sentenced to death for murdering his doctor wife. He is trying to convince a judge to give him a new trial. A pre-trial hearing for the model and social media influencer who says she fatally stabbed her boyfriend in self-defense. Plus, you've heard of serial killer John Wayne Gacy — but what do you know about his victims? A new drama series from Peacock takes a closer look. Find out more about the cases covered each week here: www.datelinetruecrimeweekly.com Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.