A security guard arrested near the 2012 Olympic site in east London has pleaded guilty to possession of Class A drug.
Leigh Whitehead, 40, of Courtland Avenue, Kent, was working as a dog handler for security company G4S.
She admitted possessing cocaine at Stratford Magistrates Court and was sentenced to a 12-month conditional discharge and ordered to pay £87 costs.
G4S said their dog handlers were licensed to hold small samples of explosives and drugs for training.
A spokesperson added: "Our ODA (Olympic Development Authority) canine services teams are highly effective because the dogs are able to regularly train using 'live' training aids.
"All dog handlers are fully vetted and operate to the highest industry standards.
"We can confirm that an internal investigation has been launched and disciplinary procedures instigated, which has resulted in the suspension of one officer, pending the outcome of a police investigation.
"An investigation has also been launched into the alleged conduct of a second officer."