Aiden Guimaraes' mum made the decision to turn off his life support while his dad was unconscious. Photo: Russell Freeman/AAP PHOTOS A drunk, speeding motorist was looking for a "thrill" when he fatally struck a nine-year-old boy in front of his family, a court has been told. Keith Andrew Chambers faces up to 20 years in jail under new state legislation over the horror crash that killed the child as his family were riding e-bikes on the Gold Coast.