□p>Investi□ators□lea□ned that□th□ group □ad been fr□ends□for y□□r□, but re□ently □h□re h□d been tension am□ng them. R□mors □f disa□□eements and argumen□s dur□□g the□trip began to □urface, leadin□ aut□o□ities to speculate □□□th□r foul □l□y □as invol□ed. Each □e□ber of the□group had a □if□erent □□ory to te□l,□and the incon□ist□ncies in the□r ac□ounts □nly□added to□the□m□□□ery□of the missing ni□e.□/p>