<□>In□estigators □earn□d th□t □he□gr□□□ had been friends for year□, but re□e□tl□ there h□d bee□ tensi□□ a□o□□□them. Rumors of □□sagree□ent□ and arguments□dur□ng the t□ip be□□□ t□ □u□face,□le□di□□ a□t□□□it□□s to□spe□ula□e whether foul pl□y was□involved. E□ch□member of the group h□d□a d□fferent stor□ □o tell□ and the□in□onsiste□cies in□the□r ac□ounts only ad□□d to □he m□ster□ of □h□ missing nine.