But another swimmer on the Brazilian squad , Vinicius Waked , was banned for a year because it was his second violation for drugs offences . Mexico 's Olympic swimming champion Cesar Cielo escapes drugs ban . Special Court of Court of Arbitration of Sport gives Cielo a warning . Cielo can defend his 50 and 100 m freestyle titles at the worlds . Cielo and two other swimmers tested positive for banned diuretic .
Mexico 's Olympic swimming champion Cesar Cielo escapes drugs ban . Special Court of Court of Arbitration of Sport gives Cielo a warning . Cielo can defend his 50 and 100 m freestyle titles at the worlds . Cielo and two other swimmers tested positive for banned diuretic .