The chief executive of UK Anti-Doping says there is "no record at all" that a package delivered to cyclist Bradley Wiggins at a race in 2011 contained decongestant fluimucil.
Nicole Sapstead says ex-Team Sky doctor Richard Freeman's laptop was stolen.
He could not attend Wednesday's Department of Culture, Media and Sport Committee hearing because of illness.
Sapstead says their investigation is ongoing - but evidence is proving difficult to come by.
Nicole Sapstead, chief executive of UK Anti-Doping (UKAD), gives evidence to a hearing of the Culture, Media and Sport Committee on the subject of combatting doping in sport at the House of Commons, London. Picture by PA PA Wire/PA Images
"We are not able to confirm or refute that it contained Fluimucil. We have asked for inventories and medical records and we have not been able to ascertain that because there are no records," Sapstead told the committee.
"There are no records… he kept medical records on a laptop and he was meant, according to Team Sky policy, to upload those records to a dropbox that the other team doctors had access to.
"But he didn’t do that, for whatever reason, and in 2014 his laptop was stolen while he was on holiday in Greece."
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