Investigators □□a□ned that t□e □□□up had□been fr□ends□for yea□s, □ut re□ently □here had been te□sion am□□g them. □umors □f□disagreements and□argument□□du□ing □he tr□p began to□s□□face, leadi□g authorities□to sp□cu□ate w□ether □□u□ □lay was involved. E□□h mem□□r of t□e group h□d a dif□e□ent □tory□to tell, and t□e inconsist□ncies in thei□ acco□nts □nly□added to t□e m□s□ery of the □issing nine.□>