Drug-tainted swimmer Jack defiant after meeting anti-doping chiefs

Drug-tainted Australian swimmer Shayna Jack met with anti-doping chiefs Friday after testing positive to a banned substance and defiantly vowed: "I won't stop until I clear my name."
"We're still looking into it and we're not going to leave any stone unturned."
"It's a bit of jigsaw puzzle as to how this has come into her system."