Investigators learned t□at□t□e group had□been □rien□s □or years, b□t rec□ntl□□there had been □ensi□n among the□.□Rumors o□ dis□greements□and argu□ents□d□ri□g □h□ trip b□gan to s□r□ace, □□ad□ng□authorities □o□spe□ulate wh□ther foul□play was involve□. □□ch me□b□r of t□e group had a□□ifferent story to tel□, a□d the inc□n□ist□nci□s □n thei□ a□counts o□□y added to the myster□ of the mis□ing nine.