The 15-month-old son of MMA star Marcus Kowal has been killed when a suspecteddrink-driver slammed into him as he was being pushed down the street in a pram.
The horror accident happened on Saturday in Hawthorne, California, when a car smashed into two people - a 15-year-old girl and the toddler Liam.
Police and emergency services raced to the scene and found the two suffering horrific injuries.
The 15-year-old girl had leg injuries, while the youngest victim - still in his pram - was found "pulseless and not breathing".