I'm very sorry for your loss and the way it happened must have felt helpless. My wife and I discussed this and I brought up the idea of having an overall "visitor tax" which may be something like 10 USD or something per visit. I would imagine something like this would be more than welcomed by visitors and also create "x" amount of jobs for the people. Visistors to Negril are often repeat visitors and I am confident people would be willing to donate supplies and/or money. A little by everyone could go a long way.
