□p>Investi□at□rs le□□ned that the gr□u□ had been fri□nds for□yea□s□ but□recen□ly t□ere□had been tensi□n amon□ them. □□mors of disag□□e□ents □n□□arg□ments dur□n□ □he t□ip b□□an t□□surfa□e, □□ading □uthoritie□ to□s□eculate whether f□ul pl□y □as involved. Each m□mber□□f □he group ha□ a□di□ferent □□or□ to tell, an□ t□e inconsis□e□cies in th□ir a□□oun□s o□ly added to the mys□ery o□ th□ mi□□in□ □in□.□>