<□2□社交□动与交易系□
<□>□n□□st□g□tors learne□ that□the group□had been fri□nds for year□, but recently there ha□ be□n □ens□on among them. Rumors □f disagree□□nt□ and a□gum□nt□ du□ing□th□ trip be□□n to□surf□ce□ leading autho□□ties to spe□ulate whe□her foul play □as□inv□lved. □ach member of the group ha□ a diffe□en□ stor□ t□ tell□ and th□ i□consistencies□in thei□ □ccounts only□adde□ to the mys□ery□o□□the m□□sing nine.