<□>Investigator□ learned that the gr□up h□□ been□friends for years□ but r□centl□ there ha□□been t□□si□n among them. Ru□o□s of□disagreements and arguments □uring t□e trip□be□a□ to su□face, le□ding□authorit□es□□o sp□culat□ whether□foul play □as involved. Each me□ber o□ the gro□p had□a □ifferen□ □t□r□□to t□ll, a□d the incons□stencies i□□the□r accou□□s only adde□ □o the □ystery of □□e mis□ing nine.□□