<□>Investig□tors le□□ned th□t□the gro□p had □□en □rie□ds for years, but □ec□□tly there had been tension □mong □hem. □umors of disagreemen□s an□□ar□uments during th□ t□ip b□gan to □ur□□ce□ leading aut□orities□to □pec□late w□e□her foul play wa□□in□olv□□.□Each□member □f the group had□a different story □o□t□□l,□and the □nc□nsist□ncies in □h□i□ accounts only added□to the □ystery of the □i□□ing nine.□>