In my memory, Shuangxi is a very nice and easy-going person. I can't believe such a cold-blooded action happening on him.

Condolence to Shuangxi. Let's comfort the family who just lost their love one. A fund account for Shuangxi is being set up by Tsinghua alumni in Boston and will be post here later.

The below link gives more information about the tragedy:
http://www.boston.com/dailyglobe2/284/metro/Woburn_man_slain_at_apartment_door+.shtml