A superyacht that sank Monday off the Sicilian coast during a storm left six passengers missing, including British tech kingpin Mike Lynch and some of his inner circle, who were gathered to celebrate his victory in a long-running legal trial.

Lynch was acquitted in June in a U.S. fraud case and was apparently aboard the Bayesian with some of the people who stood by him throughout the ordeal. Another member of Lynch’s legal team who wasn’t aboard, Reid Weingarten, said the outing was intended in part as a celebration of the acquittal.