A South Carolina mother that was found guilty of giving her infant an overdose of morphine through her breast milk will be sentenced on Friday.

According to WSPA, Stephanie Greene was found guilty of homicide by child abuse, involuntary manslaughter and unlawful conduct toward a child on Thursday.

Prosecutors said that the 39-year-old killed the six-week-old infant with the overdose transfer through the milk. The baby was found dead in a bed in November of 2010.

The Associated Press noted that a pathologist testified that the infant had what could have been a lethal level of morphine for an adult in her system.

Prosecutors said that Greene did not tell doctors that she was breast feeding so they would continue to prescribe her painkillers.

The defense argued that the prosecution did not prove that heavy doses of the drug could be passed through breast milk.

Greene faces a sentence of anywhere between 20 years to life in prison for her crime.