The Philippines president sparked international criticism for his strong anti-drugs stance, that has seen more than 9,000 civilians killed for links to drug dealing and use.
His eldest son, Paolo, has been accused as being a member of a Chinese organised crime syndicate and allegedly overseeing a drug-smuggling and drug lord protection scheme.
'My orders are to kill you if you are caught, and I will protect the police who kill you,' Mr Duterte said he told his 42-year-old son.
