The manslaughter trial of a Winnipeg mother got underway in a courtroom on Monday.
Michelle Camire is on trial for the death of her three-month-old son Michael Helgason in October 2004.
The jury was told that Camire became frustrated and threw the baby into his bassinette in a townhouse in North Kildonan.
An audiotape of her 9-1-1 call was played.
She told the operator she got frustrated and slammed him down.
A pathologist testified the boy died from a brain injury.
The trial is expected to last only a few days and wrap up this week.
