After killing the boy and his mother, he took her Apple watch and drove her BMW to the family home where he stabbed the boy's father to death.
A judge sentenced a Sydney taekwondo instructor on Tuesday to life in prison without possibility of release for murdering a 7-year-old student and the boy's parents.
Kwang Kyung Yoo, 51, sat with his head bowed as Justice Ian Harrison said he would n... [3519 chars]