Prosecutors are proposing a former Edmonton foster mom should serve 12 to 16 years in jail after she was convicted of killing a three-year-old boy in her care.

The brief submission was made Monday morning during the same court session where family members of the child read victim impact statements.

Lily Choy was found guilty of manslaughter last month after her initial conviction was overturned on appeal.

From the onset of the trial, the Crown has argued the severe cranial trauma sustained by the young boy, who cannot be named, was "non accidental." He died on January 27, 2007 after doctors at the Stollery Children's Hospital could not control the swelling in his brain.

How the child sustained his injuries was a key area of debate, with the defence arguing the young boy was aggressive and displaying harmful behaviour when he slipped from Choy's arms and hit his head on a toilet.

The Crown, meantime, contends Choy had an established pattern of abuse, citing allegations the child was at one point forced to sleep in the garage while wearing a soiled diaper.

The court heard a 911 call made by the former foster mom, where she tells the dispatcher there was no movement in the child's eyes and the boy was wheezing deeply.

A sentence is expected Friday afternoon.

With Files from David Ewasuk