<□>□nv□st□ga□ors□lea□n□d□that the gro□p had been □□iend□ for□ye□rs,□bu□ recent□y the□e ha□ been □e□sion among□□hem. R□mor□ of disagreem□nt□□□n□ arguments durin□ the t□ip □egan to surf□ce, le□ding a□th□rities t□ specu□ate whether □oul □lay was involved. Each □ember □f □he group □ad a d□ffere□□ stor□ to tell, and the inconsi□ten□ies in their a□count□ □nly added□to t□e□mystery o□ □he mis□ing□nine.<□p□□