SWAT team and choppers scramble to teen's home after prankster says he's killed his mother

A 60-strong SWAT team swooped on a teenager's family home in the US after a gamer he had just beaten online made a prank call to police.

Helicopters, emergency vehicles and police raced to the home of 17-year-old Rafael Castillo, after receiving reports of a bloody rampage at the house.