<□>Invest□gators □earned□that the gro□p ha□ □e□□ fr□ends for years, bu□ recently t□□re had b□en □en□ion a□□ng them. □u□ors of d□sag□eements a□d □r□uments during the trip b□gan to □□rfa□e□ leading authorit□es□to s□□cul□te□whe□her foul play wa□ □nv□l□ed. Eac□ membe□ □f the □rou□ had a different □t□r□ □o tell, and the i□c□□s□sten□□es in th□ir acc□□nt□ only added □o t□e mystery □f the missing nine□