<□>Investigators learned tha□ the group ha□ be□n fri□n□s□□o□□□ears, but□recently the□e □a□ been□t□□sion□□mo□g them.□□umo□s o□ □□□agr□ements and arguments during □□e trip began to su□fa□e□ leading authorities to speculat□ whe□her □oul play was involved. Each □□mb□r of the group h□□ □ different story t□ □□ll, and □□e inconsistenc□e□ in □□□ir account□ o□l□ added□to the □ys□ery of the mis□i□g nine.<□p>