Jamaican police have not ruled out a violent crime in the death of Bob Woolmer.
The inquest aims to determine if anyone bears responsibility for the death of the 58-year-old coach, who was found unconscious in his hotel room March 18, a day after his team was eliminated from cricket's World Cup.
"There was a lot of speculation, and as a result of that speculation we are having the inquest,"
More than 50 people are expected to testify. Jex estimated the process would take more than two months.
Jamaican authorities initially said a preliminary autopsy was inconclusive, but a few days after Woolmer's death police announced he had been strangled, setting off a worldwide homicide probe.
Investigators collected dozens of DNA samples and fingerprints from potential witnesses, including members of the Pakistan cricket squad and other teams.
Months later, Jamaica's police commissioner announced authorities closed their homicide investigation after getting opinions from three independent pathologists from Britain, South Africa and Canada and reviewing a toxicology report.
Police said it would be up to Jamaica's coroner to issue the official cause of death after the inquest.