A Utah mom is charged in her husband's death. Did she poison him with a cocktail?

On March 4, 2022, Kouri Richins says she found her husband, Eric Richins, unresponsive in their bed. First responders tried to save him, but it was too late for the father of three. Weeks later, police said Richins' death was caused by an overdose of fentanyl. The grieving widow from Utah was arrested and charged with murder shortly after she wrote a children's book to help their kids cope with grief. KOURI RICHINS | "Good Things Utah": I just wanted some story to read to my kids at night … And so, you know, I was like, let's just write one. KOURI RICHINS | "Good Things Utah": Like dad is still here, it's just in a different way. KUTV NEWS REPORT: New at 10. This has been a talker all day today … a Summit County woman who wrote a children's book about coping with grief following her husband's death … now accused of being the one that actually killed him. "Ronney should have texts from Eric talking about getting high as well … reword this however he needs to, to make the point, just include it all. The connection has to be made with Mexico and drugs." 

In her first primetime interview, Kouri Richins' mother, Lisa Darden, tells "48 Hours" contributor and "The Talk" co-host Natalie Morales that hours before Eric Richins was found unresponsive, the couple was celebrating a new house-flipping deal Kouri was working on. Kouri Richins told investigators she had made her husband a Moscow mule that night. But something didn't sit right when the medical examiner ruled Eric Richins died from a lethal dose of fentanyl,according to his family's spokesman, Greg Skordas.

"He wasn't an opioid user ... This doesn't smell right," says Skordas.