A grandmother has been sentenced to 24 years in prison for her part in the death of her grandson in 2015, the Weld County District Attorney's Office said in a Thursday news release.

Sandy Archuleta, 55, was sentenced Thursday on charges of child abuse resulting in the death of her 4-month-old grandson - Donovon Archuleta.

The arrest affidavit says that Donovon's mother, Angelica Chavez, dropped off the infant with his father, Roberto 'Nathan' Archuleta and Sandy, the child's grandmother in late July back in 2015.

Over the next six days, somehow Donovon's face, mouth and gums became covered in chemical burns - he also developed a sepsis infection from pneumonia and red bruises caused by pinches from tweezers, according to the DA.

Records from the medical examiner also show the baby had several broken ribs that weren't caused by CPR or the like.

Sandy Archuleta admitted to investigators that while the baby was in her care he developed a fever. To treat the symptoms of which, Sandy Archuleta reportedly rubbed him with vinegar and potato slices, ultimately causing the chemical burns all over his face.

Police reports say that the boy's mother waited several hours before calling an ambulance when she returned to Sandy Archuleta's - after she realized something was seriously wrong with Donovon.

The infant was pronounced dead at Children's Hospital Colorado on August 2, 2015.

Angelica Chavez was convicted and sentenced to eight years in prison last April. Nathan Archuleta also faces charges of child abuse resulting in death. He's pleaded not guilty.

The DA's office says the jury trial for Nathan Archuleta is set for April 10.