An Anoka woman has been sentenced to four years in prison for her role in the September 2011 death of her 3-year-old son.

Elizabeth Ann Moorman, 41, pleaded guilty to second-degree manslaughter and neglect of a child. Her boyfriend, Anthony William Urban, 26, was sentenced to more than 15 years in prison last August after pleading guilty to second-degree murder.

Three-year-old Devin Drake was admitted on Aug. 30, 2011, to Mercy Hospital in Coon Rapids, where he was diagnosed with a right cerebral hemorrhage, two collapsed lungs and retinal hemorrhaging. He was immediately airlifted to Hennepin County Medical Center, where he died Sept. 3.

Prosecutors alleged that the boy's injuries were the result of child abuse inflicted by Urban.

Authorities claimed that Moorman delayed treatment for her son despite knowing he needed immediate attention.