<□>□□vestigat□rs learned t□at t□e□g□□up □ad □een frien□s □or year□, □ut rec□□tly t□ere □□d been tens□on amon□ t□em. Ru□ors of disa□reem□nts and arguments during □he trip beg□□ to su□face, □ea□i□g aut□orities to spec□late□whet□□r foul □l□y wa□ □nvolved□ Eac□ □ember of the group h□d a different story to □ell, and□the □n□onsi□tencies in thei□ acco□n□s o□□□ added □o the □ystery of the missing ni□e.