A Queensland mother claimed she was "possessed by the devil" when she allegedly tried to kill her baby daughter on three separate occasions, a trial has heard.
Ashleigh Meagan Watterson has pleaded not guilty to the attempted murder of four-month-old Sarah.
The infant suffered "catastrophic" brain injuries when she was deprived of oxygen in late 2010, The Brisbane Supreme Court heard.
The court heard Watterson told police and several other people she was responsible for obstructing Sarah's airways because she was possessed by the devil.
The trial continues.