I spoke with one of the organizers last night. He was held up at gunpoint during the robbery and reaffirmed two things:

1.) The robbers got no money (the money is kept in a one-way safe that even the organizers did not have access to at that time for exactly that reason
2.) The robbers were not caught, but they know who they are (they were not wearing masks)

Will continue to update as I hear more. Very sad to hear this happen on our tiny island of Virgin Gorda