Nearly three years after her 31-month-old son died, Aja Westbrooks pleaded guilty Friday to second-degree murder and aggravated child neglect. She will spend the next 20 years behind bars.
Westbrooks and her live-in boyfriend, Larry Cook, rushed Anthony Westbrooks to the hospital  in March 2007. They told authorities he stopped breathing after he fell down the stairs.
But the medical examiner’s office found his injuries to be inconsistent with that explanation.
The child had massive head injuries, a rib fracture and multiple bruises of different ages all over his body. He died a few days later.
A Davidson County grand jury indicted the couple on first-degree murder charges and multiple counts of aggravated child abuse.
Cook pleaded guilty to second-degree murder and aggravated child abuse in April. He is serving a 35-year sentence.