□p>□nvesti□ators learned tha□ th□□g□oup□had □een□friends for y□ars,□□ut recently ther□□had□□een □ension am□ng □□em.□Rum□rs of disagreements and a□gum□n□s□duri□g the trip began t□ s□rface, le□ding au□ho□ities to □peculate□wh□ther □oul play was involved. Each member o□ the g□oup had a diff□□e□t story to t□ll, a□d the □nconsi□ten□□□s in th□□r□□cco□□ts □nly added to□□he myster□ of th□ m□ssi□g nine.