The Queensland premier, David Crisafulli, has said his government intends to make “many more” changes to the state’s hardline youth justice laws, after the arrest of a 13-year-old accused of stabbing a supermarket worker. Police alleged the boy attacked the woman with a knife at the Yamanto shopping centre in Ipswich, south-west of Brisbane, on Monday evening. The injured woman, a 63-year-old Coles worker, remained in a critical condition in hospital. The boy has been charged with attempted murder. Sign up for Guardian Australia’s breaking news email Crisafulli’s government was elected in October promising to implement some of the strictest