The 29-year-old Jamaican's victory was never in doubt as she ran a superb bend to enter the straight with a clear lead and finished in a stunning 21.41sec, leaving the others to battle for the minor medals.
Richardson sprinted to a championship record of 10.65sec despite being in lane nine to seal a US 100m double after Noah Lyles' victory in the men's event on Sunday.
The 29-year-old Jamaican's victory was never in doubt as she ran a superb bend to enter the straight with a clear lead and finished in a stunning 21.41sec, leaving the others to battle for the minor medals.
Richardson sprinted to a championship record of 10.65sec despite being in lane nine to seal a US 100m double after Noah Lyles' victory in the men's event on Sunday.