Kingston:A British expert, who analysed toxicology tests on Pakistan cricket coach Bob Woolmer's sample, said there were no traces of pesticides.
Pathologist Dr Ere Sheshiah testified on Wednesday that his team did not find any trace of a potentially deadly toxics in urine and blood samples provided by Jamaican analysts.
The testimony of forensic specialist John Slaughter cast doubt on findings by Dr Sheshiah, that the coach had been poisoned by the pesticide cypermethrin and strangled.
The government pathologist's ruling has been criticised by foreign doctors who instead concluded Woolmer died from natural causes, most likely heart disease.
Woolmer, 58, was found unconscious in his Kingston hotel room on March 18, a day after his powerhouse Pakistan team was eliminated from the Cricket World Cup. Four days later, Sheshiah ruled he had been strangled, launching a globe-spanning murder probe.
In testimony at the inquest into Woolmer's death on Wednesday, Slaughter said he told top police commanders and the chief of Jamaica's government-run forensics laboratory on May 10 that samples showed no sign of poisonous substances.
The laboratory chief, Dr Judith Mowatt replied that "she would have to check her files," Slaughter said.
Jamaican lab analyst Marcia Dunbar last week said she was not fully confident in the local lab results showing low levels of pesticides because the containers may have been mishandled and tainted by foreign substances.
During Tuesday's hearing, Patricia Baker-Sinclair, a janitor who worked at Jamaica's Sabina Park during the World Cup, testified that she'd witnessed Woolmer counting "coils of U.S. dollars" on March 12.
She further said that there was another man inside a stadium dressing room, according to the Jamaica Gleaner newspaper.
The inquest is expected to end on November 9, after roughly 50 witnesses appear before the 11-member jury.