Utah mom Kouri Richins — who killed her husband and then wrote a book about processing grief for their sons — was sentenced to life behind bars Wednesday after making a defiant, saccharine speech to the judge about how she had been persecuted. Judge Richard Mrazik threw the book at the 35-year-old mother after it was revealed her three young sons said they were terrified of her and wouldn’t feel safe unless she remained imprisoned for life. Before the sentence, Richins gave a 30-minute address that was aimed mainly at her boys — who are now being cared for by the sister of Eric Richins, the man she was convicted of killing. Kouri Richins was sentenced Wednesday after she was convicted of fatally poisoning her husband, Eric. East Idaho News Richins was convicted by a jury in March of aggravated murder and related crimes for the March 4, 2022, killing of husband Eric Richins, 39. His 44th birthday would have been Wednesday.…