TUCUMCARI, N.M. (KRQE) – A Tucumcari woman will spend six years behind bars after her dogs killed an elderly man last year. Investigators said Mary Montoya and her son owned five dogs that roamed freely. Law enforcement arrest four suspects, seize 715K fentanyl pills along with guns in Albuquerque In February 2023, one of their dogs mauled 64-year-old Stanley Hartt and killed him. Two months ago, Montoya pled guilty to possessing a dangerous dog leading to death and her involuntary manslaughter charge was dropped. According to court documents, law enforcement found the dog, who has since been euthanized, had a history of aggressive behavior and bit two other people on separate occasions. Montoya will serve her sentence at the Quay County Detention Center.