He punched or kicked a two-year-old-boy in the stomach when he lost his temper.
22-year-old Joseph Eke has been jailed for the murder of Dorset toddler Harry House.
Eke was left alone with Harry for only a few minutes when the boy's mother popped to the shops in May last year.
The trial heard Harry was attacked in such a violent way he suffered severe internal injuries and a fractured skull.
From Winchester Crown Court, Kerry Swain reports.
Kerry spoke to Det Chief Insp Sarah Derbyshire, Dorset Police.
More top news
Wednesday afternoon's weather for the west of the region
Wednesday afternoon's weather for the east of the region
Wednesday's Pollen Forecast