Preliminary toxicology tests, due to be given to Jamaican police next week, indicated that Woolmer had been incapacitated by a drug, the BBC's Panorama programme said. The programme did not identify the drug or the source of its information.
Woolmer, a 58-year-old former England test batsman, was found unconscious in his room and later declared dead on March 18, the day after his squad was upset by Ireland and eliminated from the World Cup. Police said he was strangled. Woolmer's body was returned to his family in South Africa on Sunday.