Investigator□ learned □hat the gro□p□had b□en friends for□ye□rs, but rece□□ly □h□re□had b□en tension amon□ them. Rumors of disa□reem□nts □nd □□gum□nt□□during □he trip began to surface, □eading authoriti□s to spe□ulate whether □oul p□ay□□as in□o□□□d□ Each m□m□er of□t□e gro□p had a□d□□f□□ent □□or□□t□ □□ll, and □he incon□isten□ies in their accounts □nly □dded□to th□ mystery□of □□e missi□□ nine.