In□□stigatorslearn□dtha□the□rouphadbee□□□i□□d□foryears,butrecentlyth□rehadbeen□ensionamongthem.Rumor□ofdi□agreementsan□argumentsduring□hetripbegantosu□fa□□,leadi□□aut□oriti□s□os□ecu□atewhethe□foulp□ay□asinvolv□d.Eachmember□fthegrou□□□dadiffe□entstory□o□□ll,□□dt□einco□sistenciesinth□ira□coun□son□yaddedtothemy□te□yofthemiss□□gnine. Investigatorsle□rne□thatthegrouphadbeenfrie□dsfor□ear□,butrecentlytherehad□eentensiona□ongthe□.Rumor□ofdisagreemen□s□ndargumentsd□ringthetripbe□antosu□face,l□□□i□gauthorities□ospeculat□□hetherfoulp□aywasinvolv□d.□achmemberoft□egrouphadad□f□eren□storytotell□a□d□heinconsistenc□esintheiraccou□ts□nlyadde□tothemyste□yofthemi□singnine. □nves□□gator□l□a□nedthat□hegr□uphadbeenfr□endsforye□rs□□utr□cen□l□therehadbeentension□mongthem.Rumorsofdisa□ree□□ntsandar□□ments□uring□hetrip□□gantosurface,l□a□ingaut□□ritiestos□□cula□ewhetherfoul□laywa□invo□ved.□achmem□ero□thegroup□ad□d□ffe□entstory□□□el□,andthein□o□sistenciesintheirac□ountson□yadde□t□th□m□steryofthemissi□gn□□e. □nv□stig□torslear□edt□att□eg□ouphadbeenfriendsforyears,bu□recentlytherehadbee□t□□s□onamongth□m.□umorsofdi□agreem□nt□andarg□m□ntsdur□n□th□tripbegantosurfa□e,□eadingauthoriti□s□□specul□tewhetherfoulplaywa□invol□ed.□achme□b□rofthegroup□ad□differentstorytotell,andth□in□onsisten□iesintheir□ccountsonlyadded□othemysteryofthe□issingnin□.