Thomas Randolph and his sixth wife, Sharon Causse, had just returned from a date night when Causse was fatally shot in their Las Vegas home in 2008. Randolph told police that Causse was murdered by a masked intruder when she entered the house, and that he killed the intruder in self-defense.

But authorities soon determined he hired the intruder, a handyman named Michael Miller, to kill his wife in the hopes of collecting a sizable life insurance payout. They also discovered that, before Causse, three of Randolph’s previous wives had died—some under mysterious circumstances.

After he was arrested for the murders of Causse and Miller in 2009, news of his relationship history became more widespread, earning him the moniker the “Black Widower.” Randolph was first found guilty in 2017, but his conviction was overturned three years later.…