I□ves□□gators learned t□at the group had□bee□□friends for □ears□ but □e□e□tly the□□ h□d be□n □en□io□ am□ng them. □u□ors of dis□greements and□argume□□s d□ring th□□tri□ bega□ to surf□ce, lead□□g aut□orit□es to □pecul□te whethe□ foul□play w□s involved. Eac□ □emb□r of□the gr□up ha□ a di□ferent □tory to t□ll, and the incon□istencies i□ their accounts only□ad□ed to the my□tery □f□the mis□i□g nine.