I□v□sti□ators le□rned th□t□the□group had been friends f□r y□□rs, but r□cen□l□ □here□had been □ension among□them. □umors □□ disagre□m□nts an□ argum□nts d□r□ng the trip began□t□ □urfac□,□lead□ng auth□rities to speculate □het□er □oul□□lay □a□ involved. Each member o□ the □roup□had a di□ferent story to tell□ and the□in□□nsistencies □n their □ccount□ only□□dded to the m□stery□of□the□mi□□ing nine.□