Investigatorslearnedthatthe□roupha□b□enfr□endsforyear□,butr□ce□tl□the□□hadbeentensionamongth□m□Rumorsofdisagreementsandargume□ts□uringthet□ipbegantosurface,leadin□au□h□ritiestospecu□atewhetherfou□p□ayw□si□v□lved.Each□e□berofthegrouphadadifferent□t□rytotell,andth□inco□sis□enciesinthe□raccountso□lya□de□tot□e□ysteryoft□emissing□□ne□ Inv□stig□torslearnedtha□thegrouphadbe□nfriends□oryear□,butrecent□yther□hadb□enten□ionamongt□em.Rumorsofdi□agreem□ntsanda□gume□t□du□ingthetripb□□□ntosurface,lea□ingauthorit□estospecu□ate□het□□rfou□play□asinv□l□□d.Eac□member□fth□gr□uphad□di□ferentst□rytote□l□a□dtheinconsistencies□ntheiraccounts□□ly□ddedtothemyste□yofthemiss□ngnine. Investigatorsle□rnedthatt□e□rouphadbeen□riendsf□r□e□rs,butrec□ntlythereh□dbe□ntensionamongt□em.Rum□rsofdi□agreementsanda□gumen□sdur□□gthetri□□e□antosurface,leading□uthoriti□stospeculat□whet□erfoulp□ay□□sinvolved□□achmemb□rofth□grou□hadadif□ere□ts□□r□totell□a□dthein□□nsis□enci□si□t□ei□ac□ountso□lyaddedtothemys□eryof□□em□ss□ngnine□ Investigat□rslearne□t□at□hegr□uphadbeenfrie□dsf□ryears,□u□rece□tlytherehadbee□ten□ionamongth□m.Rum□rsofdis□g□eem□ntsa□dargumen□s□uringthetripbegantosurf□ce,le□dingauthoritiestospeculatew□□th□rf□ulpl□yw□sinvolved.Eachmemberofthegroupha□adifferen□s□□ry□□tel□,□nd□hein□□nsiste□ci□sintheira□co□nt□o□l□a□dedtothemy□teryofth□mis□ingnine.<□p>