PHOENIX -- (KNXV) -- A Phoenix mother has been sentenced to 20 years in prison for second-degree murder in her young daughter's death.
Natalie Russell originally was charged with first-degree murder and child abuse in the April 2016 death of her daughter, Adalynn, who was nearly two years old.
She pleaded guilty to second-degree murder in December 2017.
Autopsy results showed the girl had toxic levels of methadone and methamphetamines in her system at the time of her death, which was ruled a homicide.
Police say Russell "recklessly left a 120 mg bottle of liquid methadone in reach of her children" and Adalynn drank some of the drug used to prevent withdrawal symptoms in those addicted to opiates.