An inquiry to Louisiana authorities by the Netflix series “Unsolved Mysteries” jump-started two dormant murder investigations into the slayings of a pair of married couples and led to an arrest last week.
The Kenner Police Department said Dernell Nelson, 35, of LaPlace, is charged with first-degree murder in the slayings of Hermania Ellsworth and Charles Davis. Investigators said he may also be connected to the slaying of another married couple found dead three weeks after the death of the first couple.
The first killings occurred on June 17, 2010, when authorities found Ellsworth…