□p>In□□stig□□□□s learned that □he group□had bee□ friends f□r□years,□but□recently □here ha□ been ten□io□ □□on□ them. □umors of disagreemen□s and□arguments durin□ the t□ip□be□an to su□f□c□, l□adi□g □uthorit□es to sp□culate□whether foul □□ay □as inv□lved□ □ach □emb□r of□□□e□group had a different □t□□y to□tell, and the inconsist□nc□es in their ac□ount□ □nly ad□ed to th□ mystery of the missing□nin□.