□<□>Investigators lea□ned that the group □ad been friends for□□□ars□□bu□ rece□tly there had been□tensi□n among them. Rumor□ □f disagreements a□□ argum□nts □uring □he□trip began □□ surface, le□din□ authorities □□ speculate□whe□her foul play □a□ involve□. □ac□□member □f□□he g□ou□ ha□ a diff□rent story to te□l,□and the incons□stencies in their accoun□s o□l□ □dde□ to the□mystery of the missing nine.□