<□>Investig□tors □earne□□t□at the group□had been fri□nd□ for years, but re□ently the□e □ad been tension among them. Rumo□□ of dis□□reeme□ts □n□ arguments d□ring the trip began to s□□fac□, lead□n□□aut□orities to□sp□culate whet□e□ f□ul play was inv□lved. Ea□h member o□ t□e g□o□p had a different □tory to tell, and t□□ □nconsiste□□ie□□in their acco□nts only □dded t□ □he□myst□ry of□th□ m□□□ing ni□e.