local officials say methyl bromide is suspected to have been used improperly several times in the u.s. virgin islands , in different parts of the island ; even the governor said his condominium complex was fumigated with it in 2013 , without his knowledge .
investigators are still trying to piece together exactly what happened at the sirenusa resort , where a delaware family 's vacation in paradise turned into a nightmare .
theresa devine and steve esmond and their two children fell gravely ill and suffered seizures ; two brothers , ages 14 and 16 , remain in comas .