KINGSTON (Jamaica), Nov 13: An expert witness disputed earlier testimony by telling a inquest that he was unable to find any traces of the deadly-pesticide cypermethrin in samples taken from ex-cricket coach Bob Woolmer.

“No cypermethrin was found in the adequate samples from the forensic lab,” Professor Das Gupta said on Monday.

Gupta, head of the pesticide research laboratory at the University of West Indies, conducted a series of re-test Nov 6 and 7 on blood samples taken from the body of the former Pakistan cricket coach.

Gupta said he re-tested eight samples from government laboratory and another five from the United Kingdom.

Last week, coroner Patrick Murphy ordered that the samples be re-tested.

Gupta’s findings support those of British forensic scientist John Slaughter who also said he was unable to find cypermethrin in blood samples.

But Gupta’s testimony contrasts that of other witnesses, including Fitzmore Coates, acting chief forensic officer at the Jamaican federal laboratory, who said there was so much potentially deadly cypermethrin in Woolmer’s system that it could have caused his death.

Gupta said Coates’ analysis was flawed.

“I found his data very puzzling and his analysis was not proper,” Gupta said adding the quality of the samples may have been as good when he conducted his tests compared to the time they were first tested in March.

Deputy Commissioner of Police Mark Shields was expected to take the stand on Tuesday.—AFP