By Lauren Ferri For Daily Mail Australia and Aap
Published: 13:33 BST, 6 April 2019 | Updated: 13:35 BST, 6 April 2019
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Australian swim star Cate Campbell has called for a review of drug testing protocols after Chinese swimmer Sun Yang was cleared of smashing a vial of his blood so it could not be tested.
A report by British newspaper The Sunday Times in January claimed Sun, 27, was involved in a confrontation with doping officials at his home in Zhejiang province in September last year.
International swimming federation FINA cleared him of any wrongdoing because there was insufficient evidence to sanction him.
But World Anti-Doping Agency (WADA) last month announced it was challenging that decision, meaning Sun - a world-record holder and Chinese national hero - could face a lifetime ban if found guilty.
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Australian swim star Cate Campbell (pictured) has called for a review of drug testing protocols in the midst of a doping scandal surrounding Chinese swimmer Sun Yang
Recent reports claim Sun Yang's (pictured) security guard smashed a vial of his drawn blood with a hammer before it could be analysed, but the swimmer denied the allegations
Now, Aussie swimming legend Cate Campbell is demanding a thorough investigation.
'It makes me incredibly angry and it raises some really serious questions that demand answers if WADA and FINA want to
