□情节发展:跌□起伏的故事线
Investig□□ors l□arn□d□that the group □ad□bee□ friends for years, bu□ recently there had been tension □mong them. R□mors of disagreements and □rgumen□s □urin□□t□□ trip began to □urfa□e, leading aut□orities to spec□late w□ethe□□fou□ play was involve□□ E□□h member of□□he □□o□p had a differe□t st□ry □o tell, □□d□the i□consisten□□e□ in their acco□nt□ on□y add□d to t□e my□tery □□ t□e missing nine.